I never actually played Kinect but when I saw the games being played I noticed tons of lag. Dance Central was perhaps the best at hiding the lag but Deca Sports for example was so bad that the players punched and about a second or two later the punch showed up. Plus the punches didn't look one to one they looked like premade movements much like the Wii's games.
I was really turned off, but I've heard it just looks horrible and that while playing you don't even notice. I wish I could have gone hands on but the line was at least an hour long and I had better games to check out. A friend of mine played Dance Central and Just Dance 2, he said Just Dance 2 was more fun.
Do you know if theirs a Kinect demo station in Vancouver since I don't live far from Vancouver I'd love to actually play the thing.
P.S - I can't even buy it if I wanted. I live in an apartment and even playing WiiFit and Donkey Konga I got noise complaints from the apartment below. Playing Kinect would be very noisy...too bad...