And every research shows that up to 70% doesnt even make it past the start of the game and they log off/uninstall/never play it again for every game out there.
Anyone can make up numbers.
What you guys dont understand is that WoW has a mostly stable amount of players that remain, that number was anywhere from 3 to 5mil spread in the three continents and thats what Blizzard is focusing on.
You guys crying on here are the minority, Blizzard also knows you are gonna expansion hop as you always did, same with the majority of the returners, their whole design is to simple keep you a few months more as much as possible, not forever.