Part of the reason for the lower numbers may be that the game has yet to launch in China. During the conference call Morhaime stated that Blizzard was working with its partner Netease to launch StarCraft II in that country but so far there's no word on a China release date. Meanwhile the game's players have uploaded over 150,000 user-made maps to Battle.net. Morhaime stated that work continues on the next game, StarCraft II: Heart of the Swarm, but offered no other details.
Gallery: StarCraft 2 Screenshots