There’s quite a bit of talk around the industry, looking at not only how many copies Blizzard can sell of Wrath of the Lich King, but how fast! Gamasutra has quotes from a Janco Partners analyst.

The analyst is also “impressed” at the fact that World of Warcraft ‘s subscriber base has grown to 11 million even amid economic anxieties and two recent major releases, Age of Conan and Warhammer Online , neither of which have appeared to slow the game’s momentum.

Based on its existing subscriber base, says Hickey, “We expect the upcoming release of WoW ’s expansion pack… would yield a sell-through of roughly 5 million units in the first month.”

Have you pre-ordered yet? Or will you wait to order the expansion?