If it is the case that usage statistics do only take pokemon that are actually used into account, I can imagine that leads have a disproportionate influence.
Here's the thing, though--an avergae of 9.8 pokemon per battle is pretty darn good and seems to indicate that this shouldn't be a HUGE issue. I'll probably do a second run in which I take out any battles that don't have the line:
Code:
<div class="BeginTurn"><b><span style='color:#0000ff'>Start of turn 6</span></b></div>
(battles that were forfeited before turn 6)
and see how much of a difference that makes.
Edit:
For more on that topic, I generated a simple script to allow me to get a histogram of number of pokemon used per battle:
[Image removed in favor of the one below]
As you can see, the fraction of battles with less than seven pokemon (all of which must have been forfeits) is significant (13.5%). I'm going to go ahead and put in my "don't count forfeits before turn six" rule. Note that this won't ELIMINATE that tail, but I expect it to reduce it pretty drastically.
Edit 2:
Implemented the rule, re-plotted:
As you can see, that eliminates ALL the battles forfeited at the lead screen (I was very relieved, by the way, to see that Smogon doesn't have 1v1). The average number of pokemon per battle is now a whopping 10.3 (not as big a difference as I was expecting), with only 6.6% of battles only showing six pokemon or less (nice). And how does this change the usage stats? See below:
Code:
Total battles: 3485
Total pokemon: 36026
[B]1 Tyranitar 1475 21.16212%
2 Rotom-W 1425 20.44476%
3 Gliscor 1360 19.5122%
4 Scizor 1342 19.25395%
5 Ferrothorn 1233 17.6901%
6 Politoed 1164 16.70014%
7 Heatran 1146 16.44189%
8 Latios 978 14.03156%
9 Jirachi 956 13.71593%
10 Excadrill 851 12.20947%
11 Dragonite 812 11.64993%
12 Thundurus 757 10.86083%
13 Skarmory 740 10.61693%
14 Jellicent 677 9.71306%
15 Deoxys-S 565 8.10617%
16 Blissey 542 7.77618%
17 Reuniclus 536 7.6901%
18 Celebi 515 7.38881%
19 Haxorus 509 7.30273%
20 Starmie 500 7.1736%
21 Gengar 499 7.15925%
22 Gyarados 498 7.14491%
23 Forretress 470 6.74319%
24 Conkeldurr 469 6.72884%
25 Latias 449 6.44189%
26 Magnezone 449 6.44189%
27 Gastrodon 445 6.38451%
28 Volcarona 424 6.08321%
29 Infernape 422 6.05452%
30 Salamence 421 6.04017%
31 Landorus 418 5.99713%
32 Ninetales 392 5.6241%
33 Tentacruel 377 5.4089%
34 Terrakion 377 5.4089%
35 Mamoswine 367 5.26542%
36 Bronzong 353 5.06456%
37 Toxicroak 332 4.76327%
38 Scrafty 330 4.73458%
39 Hydreigon 325 4.66284%
40 Lucario 312 4.47633%
41 Espeon 307 4.40459%
42 Virizion 301 4.31851%
43 Breloom 299 4.28981%
44 Hippowdon 277 3.97418%
45 Chandelure 277 3.97418%[/B]
46 Vaporeon 236 3.38594%
47 Venusaur 224 3.21377%
48 Metagross 206 2.95552%
49 Chansey 198 2.84075%
50 Roserade 195 2.7977%
51 Mienshao 194 2.78336%
52 Mew 186 2.66858%
53 Quagsire 183 2.62554%
54 Slowbro 177 2.53945%
55 Zapdos 177 2.53945%
56 Tangrowth 177 2.53945%
57 Cloyster 175 2.51076%
58 Donphan 164 2.35294%
59 Machamp 151 2.16643%
60 Kingdra 151 2.16643%
61 Dugtrio 148 2.12339%
62 Swampert 142 2.0373%
63 Abomasnow 139 1.99426%
64 Darmanitan 139 1.99426%
65 Azumarill 137 1.96557%
66 Tornadus 135 1.93687%
67 Jolteon 123 1.76471%
68 Gorebyss 117 1.67862%
69 Claydol 109 1.56385%
70 Sawsbuck 98 1.40603%
71 Wobbuffet 97 1.39168%
72 Victini 93 1.33429%
73 Zoroark 87 1.24821%
74 Hitmontop 85 1.21951%
75 Shaymin 81 1.16212%
76 Cofagrigus 81 1.16212%
77 Flygon 80 1.14778%
78 Togekiss 76 1.09039%
79 Whimsicott 72 1.033%
80 Porygon2 70 1.0043%
81 Empoleon 70 1.0043%
82 Weavile 70 1.0043%
83 Mandibuzz 70 1.0043%
84 Azelf 68 0.97561%
85 Blastoise 66 0.94692%
86 Arcanine 66 0.94692%
87 Nidoking 65 0.93257%
88 Aerodactyl 63 0.90387%
89 Krookodile 62 0.88953%
90 Gallade 55 0.7891%
91 Sigilyph 51 0.73171%
92 Dusclops 49 0.70301%
93 Alakazam 48 0.68867%
94 Heracross 48 0.68867%
95 Sharpedo 48 0.68867%
96 Cobalion 48 0.68867%
97 Froslass 47 0.67432%
98 Cradily 46 0.65997%
99 Rotom-C 46 0.65997%
100 Charizard 45 0.64562%
101 Snorlax 45 0.64562%
102 Electivire 44 0.63128%
103 Spiritomb 42 0.60258%
104 Escavalier 41 0.58824%
105 Medicham 40 0.57389%
106 Murkrow 38 0.54519%
107 Suicune 38 0.54519%
108 Raikou 37 0.53085%
109 Cresselia 36 0.5165%
110 Clefable 35 0.50215%
111 Venomoth 35 0.50215%
112 Yanmega 35 0.50215%
113 Deoxys-D 35 0.50215%
114 Staraptor 34 0.4878%
115 Eelektross 34 0.4878%
116 Kyurem 34 0.4878%
117 Accelgor 33 0.47346%
118 Stoutland 32 0.45911%
119 Throh 32 0.45911%
120 Milotic 31 0.44476%
121 Lilligant 31 0.44476%
122 Lanturn 30 0.43042%
123 Nidoqueen 29 0.41607%
124 Ninjask 29 0.41607%
125 Golurk 29 0.41607%
126 Smeargle 28 0.40172%
127 Dusknoir 27 0.38737%
128 Bisharp 27 0.38737%
129 Exeggutor 26 0.37303%
130 Ursaring 26 0.37303%
131 Archeops 26 0.37303%
132 Victreebel 25 0.35868%
133 Slowking 25 0.35868%
134 Aggron 25 0.35868%
135 Ambipom 24 0.34433%
136 Rotom-H 24 0.34433%
137 Alomomola 24 0.34433%
138 Qwilfish 23 0.32999%
139 Uxie 23 0.32999%
140 Crobat 22 0.31564%
141 Shiftry 22 0.31564%
142 Slaking 22 0.31564%
143 Cryogonal 22 0.31564%
144 Weezing 21 0.30129%
145 Manectric 20 0.28694%
146 Torterra 20 0.28694%
147 Scolipede 20 0.28694%
148 Honchkrow 19 0.2726%
149 Carracosta 19 0.2726%
150 Beheeyem 19 0.2726%
151 Xatu 18 0.25825%
152 Shuckle 18 0.25825%
153 Whiscash 18 0.25825%
154 Absol 18 0.25825%
155 Walrein 18 0.25825%
156 Leafeon 18 0.25825%
157 Braviary 18 0.25825%
158 Parasect 17 0.2439%
159 Umbreon 17 0.2439%
160 Registeel 17 0.2439%
161 Durant 17 0.2439%
162 Omastar 16 0.22956%
163 Druddigon 16 0.22956%
164 Tauros 15 0.21521%
165 Sableye 15 0.21521%
166 Banette 15 0.21521%
167 Mismagius 15 0.21521%
168 Rapidash 14 0.20086%
169 Shedinja 14 0.20086%
170 Porygon-Z 14 0.20086%
171 Stunfisk 14 0.20086%
172 Aron 13 0.18651%
173 Crustle 13 0.18651%
174 Sceptile 12 0.17217%
175 Gardevoir 12 0.17217%
176 Trapinch 12 0.17217%
177 Armaldo 12 0.17217%
178 Amoonguss 12 0.17217%
179 Hitmonlee 11 0.15782%
180 Ampharos 11 0.15782%
181 Sudowoodo 11 0.15782%
182 Swellow 11 0.15782%
183 Masquerain 11 0.15782%
184 Torkoal 11 0.15782%
185 Sandslash 10 0.14347%
186 Ludicolo 10 0.14347%
187 Floatzel 10 0.14347%
188 Rhyperior 10 0.14347%
189 Persian 9 0.12912%
190 Dodrio 9 0.12912%
191 Hitmonchan 9 0.12912%
192 Steelix 9 0.12912%
193 Serperior 9 0.12912%
194 Zebstrika 9 0.12912%
195 Audino 9 0.12912%
196 Feraligatr 8 0.11478%
197 Dunsparce 8 0.11478%
198 Bastiodon 8 0.11478%
199 Golduck 7 0.10043%
200 Mr. Mime 7 0.10043%
201 Lapras 7 0.10043%
202 Togetic 7 0.10043%
203 Relicanth 7 0.10043%
204 Lickilicky 7 0.10043%
205 Ferroseed 7 0.10043%
206 Crawdaunt 6 0.08608%
207 Emboar 6 0.08608%
208 Bouffalant 6 0.08608%
209 Volbeat 5 0.07174%
210 Rampardos 5 0.07174%
211 Skuntank 5 0.07174%
212 Galvantula 5 0.07174%
213 Arbok 4 0.05739%
214 Poliwrath 4 0.05739%
215 Hypno 4 0.05739%
216 Rhydon 4 0.05739%
217 Jynx 4 0.05739%
218 Ditto 4 0.05739%
219 Combusken 4 0.05739%
220 Regice 4 0.05739%
221 Lopunny 4 0.05739%
222 Drapion 4 0.05739%
223 Magmortar 4 0.05739%
224 Cottonee 4 0.05739%
225 Kangaskhan 3 0.04304%
226 Pinsir 3 0.04304%
227 Kabutops 3 0.04304%
228 Dragonair 3 0.04304%
229 Typhlosion 3 0.04304%
230 Gligar 3 0.04304%
231 Octillery 3 0.04304%
232 Miltank 3 0.04304%
233 Hariyama 3 0.04304%
234 Nosepass 3 0.04304%
235 Cacturne 3 0.04304%
236 Lileep 3 0.04304%
237 Munchlax 3 0.04304%
238 Regigigas 3 0.04304%
239 Samurott 3 0.04304%
240 Cinccino 3 0.04304%
241 Golem 2 0.02869%
242 Electrode 2 0.02869%
243 Marowak 2 0.02869%
244 Lickitung 2 0.02869%
245 Scyther 2 0.02869%
246 Moltres 2 0.02869%
247 Bellossom 2 0.02869%
248 Misdreavus 2 0.02869%
249 Corsola 2 0.02869%
250 Mantine 2 0.02869%
251 Glalie 2 0.02869%
252 Luxray 2 0.02869%
253 Hippopotas 2 0.02869%
254 Seismitoad 2 0.02869%
255 Sawk 2 0.02869%
256 Maractus 2 0.02869%
257 Klinklang 2 0.02869%
258 Heatmor 2 0.02869%
259 Ivysaur 1 0.01435%
260 Primeape 1 0.01435%
261 Magnemite 1 0.01435%
262 Koffing 1 0.01435%
263 Meganium 1 0.01435%
264 Flaaffy 1 0.01435%
265 Unown 1 0.01435%
266 Houndoom 1 0.01435%
267 Entei 1 0.01435%
268 Mawile 1 0.01435%
269 Lairon 1 0.01435%
270 Altaria 1 0.01435%
271 Castform 1 0.01435%
272 Kecleon 1 0.01435%
273 Tropius 1 0.01435%
274 Wynaut 1 0.01435%
275 Vespiquen 1 0.01435%
276 Pachirisu 1 0.01435%
277 Mesprit 1 0.01435%
278 Basculin 1 0.01435%
279 Duosion 1 0.01435%
I don't think it does, really (keep in mind when comparing the stats, this version also has the formes fixed).