I will ask this, why do you all care for exclusives so much? Why buy a console for like 1-2 games? On Xbox the only exclusives I actually enjoyed are Forza and Ace Combat 6. Forza and GT are pretty much interchangeable. If you're good at one you're most likely good at the other. AC on the other hand wasn't, Hawks is horrid compared to AC but AC isn't exclusive to XB anymore, AC:H(not that I like this one) was multi-platform. All the rest of the games I enjoyed were 3rd party games.
A list of exclusives I actually remember playing.
XB:
Halo(boring)
Gears(even more boring)
Forza(your flagship wannabe racing sim)
Fable(a RPG that is way too easy)
Crackdown(pretty damn boring)
PS3:
Deadzone(another boring shooter to me)
Uncharted(the most linear game ever, it might as well be a movie. It's gameplay is a boring shooter)
GT(racing sim wannabe like Forza)
inFamous(boring)
MotorStorm(decently fun arcade style racing game)