Not really a surprise considering the availability of the PS3 and Wii. I'm sure the Wii would have out sold the 360 if the units were available. I might have bought a Wii if I could have found one. But I think those Gears of War ads must have boosted sales.
The key is the failure so far of the PS3... I saw Bestbuy had 1000 at one point and 100 at another. As a hardcore gamer I couldn't see myself buying one. No reason to at all...