According to Kotaku, World of Warcraft had 12 million subscribers in October of 2010. More that 12 million, actually.
Yesterday Mike Morhaime gave the subscription number for WoW as 11.4 million, a 5% drop.
With that small percentage, WoW has shed enough subscriptions since Cataclysm came out to populate two moderately successful or one very successful MMO, as measured by the scale that does not include WoW.
Of course, that drop might not be just in North America and the EU, but a good chunk no doubt are.
And if those players are off to play other MMOs such as Rift, it ought to be like a renaissance in the MMO market. That number of players looking for a game could make a game a success.
I am sure that Rift has soaked up a fair number of those departing WoW, but I wonder who else is feeling the benefit of this change?
And then there all of those SOE players looking for a game these days. That is another good chunk.