Alright, the results are in... Filled up today, and was quite surprised with the outcome...
In Town with a not so light, right foot, I managed to get 22.5mpg's.
Before the tune, I would get 22 if I kept the rpm's at 3k or below. So it is an improvement there in fuel economy.
Do you remember what dyno numbers you got when you first dyno'd the car?
Obviously without him tuning it?