I don't see much fuel difference in mine whether it is with the race map or economy map, and driving hard or gentle makes little difference on long journeys. 7MPG is the biggest real world difference I can get on a full tank! Obviously when you put your foot down the MPG drops a lot but the average over a journey still seems to be good and I'm sure it gets more economical when you've given it a good thrashing anyway.
I stick with economy though, the lower wear and tear and extra few MPG I get are worth it IMO for the commutes.