Indeed, on that Brighton run whilst on the motorway it showed how much quicker a TT is in comparison to an N/A both acceleration and Top Speed wise. Some of the way I'd let myself drift to the back to watch everyone go past then floor it to catch up.
But, the TT's seemed to effortless overtake and kept accelerating to the point I thought...'I'm wasting petrol on this '
I agree with you that it probably would be that 30% of you urging for that bit more power (I do it myself, I'd love a BPU'd TT6) but it's not for right now. My current lifestye suits the N/A just fine. I think that's one of the main aspects around the car you choose. As said, many have bout a TT and used it as a weekend car for the cheaper option, some use a TT as a daily driver. Either way a Supra is a great car to own.