GSXR: ~35mpg, but its still in the building phase. So I haven't ridden it.
And yes, mpg depends on your riding style. If you rev it everywhere, you'll use up more gas. I drive very aggressive on the bikes (fast accelerations) so those are the lows for the bikes. I've seen 60mpg on the F2 before, but that was with granny shifting at 5k (if any grandma's ride sports bikes that is) and not exceeding 65mph.