The Wii version of Shaun White Snowboarding sold best, and I bet the fact that it used the Wii Balance Board had something to do with it. The Guitar Hero and Rock Band games also sell best on Wii, I guess Wii owners are more receptive to games that use peripherals.
I also wouldn't be surprised if this sold best on the Wii.
The 360 & PS3 crowd aren't exactly the "active" gamers
I think more Wii owners don't have an elitist snobbish attitude problem. Lots of those 360 and PS3 fanboy people have an attitude that they know 'what a game should be' and 'how a game should control' and limit themselves to the same tried and true formula.
Wii gamers tend not to at least try out the new ideas before bashing them. I totally dig the controls in Excite bots and wouldn't have it any other way.