It's the way the car drives which is so different in sport mode after the remap. The carbon clean and remap (and in my case a stage 2 inlet manifold) doesn't make a massive difference to the performance, but when combined with the much more aggressive throttle map in sport mode, the car just feels much more eager. Post remap, this is especially noticeable when switching between normal and sport mode.
I agree, if you want massive hikes in ultimate "go" from a remap, you need forced induction to start with.
Tile Driver - you're going to love it

Dave