WoW is not the king of the MMO Sphere

Is World of Warcraft really the most popular MMO? – GigaOM

Probably not, as it turns out; certainly not in the Western hemisphere, anyway. Working with publicly-known figures, veteran MMO developer Raph Koster recently made this observation on his blog: It may be possible that World of Warcraft is actually sitting around #4 or #5 in the top MMOs in North America and Europe.