Some cars do better than EPA estimates, some do worse. My 135 cabrio showed an average of 24mpg at turn in, that was in 8000 miles. Pretty good, considering the acceleration! My Mini Cooper S cabrio (turned in December) had a final average of 34, and my current (non S) is currently at 38.4!!! average with only 1500 miles on the odo! It just keeps going up and up! The EPA window sticker says 29/37.

I'll say this: driving style is the key. I have been watching the instant MPG display like a hawk and I can make a HUGE difference if I slow down a few MPH going up hills (as long as no one is behind me)