I found after my remap it has gone up a bit.
Driving to oxford (from preston) the other weekend, I was doing average 85mph there and was getting about 43mpg. Coming back I wasnt in a rush, so sat at 68 (gps speed) and it happily returned 48mpg all the way home, but on the instant mpg it was showing consistantly over 52mpg, just the average was 48
Great to have the power there when you want it, and also the mpg when its the end of the month