Pretty incredible. EB Games isn't a small company by any means, and while we knew Wrath was big, it looks like Blizzard's second WoW expansion smashed pretty much every sequel it could in the chain, even toppling some of the console gaming records. Anyone that claimed World of Warcraft had peaked with Burning Crusade should be looking pretty foolish at this point.
We'll have to see where Blizzard goes from here -- there's no doubt that one reason Wrath was so popular out of the gate was that it returned to the "core" of Warcraft III: the story of Arthas and the Scourge. Can Blizzard replicate that with another expansion, no matter what the setting?