Same thing happen to me after uploading the 91R tune. No matter how i drove, fast or slow, more pedal less pedal, didn't matter I still couldn't break 22mpg on my normal commute. I recently uploaded the 91P tune and to my great surprise, I now get a "stock like" 26-27mpg on the same commute, while only losing a tiny bit of performance overall.
2011 Kona 3.7 Slushbox
-91R Bama Tune w/2.73's