Valve's numbers are completely accurate for all gamers that have Steam and opted to participate in this survey. That's all. That is a substantial amount of gamers anyway.
You have to have a decent PC to play WoW too, at least at an enjoyable level.
LEFT4DEAD411.COM
Bet with disolitude: Left4Dead will have a higher Metacritic rating than Project Origin, 3 months after the second game's release. (hasn't been 3 months but it looks like I won :-p )