Taiwanese man beats World of Warcraft

“A character named “Little Gray” on the Wrathbringer server has completed all 986 of the game’s ‘cheevos, killing 390,895 creatures and finishing 5,906 quests along the way.” [Joystiq]

I was under the impression that it couldn’t be beat and this isn’t work of The Onion. It really makes you wonder: How many hours did he invest into this game?