I have calculated this with both 50% Hwy/50% City, 25% Hwy/75% City, and mostly city, and I ALWAYS end up right at around 15.5 MPG. Granted, my "city" driving involves sitting in still traffic, moving for a quarter mile, then sitting in traffic again. And, all my city trips are 3 miles or less. Super short, super trafficky, and always with the A/C on. I guess that's why I'm not seeing more than 16 MPG.

Also, I like to gun it...but when she was being broken in I took it easy. I have noticed no difference between gunning it and taking it easy off the line. Maybe because my mileage is piss due to my short city trips, I guess it doesnt matter if I take it easy off the line...