I am a 997TT owner in the US. I have had the car since June '06 and really love it. At the same time, I had a 997S for about 9 months before opportunity for TT. My thoughts:
- the TT has awesome power, but I am a RWD guy. I really preferrred the S from a handling and response perspective
- TT has scary acceleration...I mean it is crazy fast..I love it
-- S seems a lot lighter, hard to explain
-- I drive both cars "everday" to the gym, to work, the school to get my kids, etc. There is no problem driving a TT everyday. I am not image conscious...but the TT always gets you front row at the steakhouse which is good and bad
-- TT road height is no problem
-- i live in a mid-sized city...i can drive 95mph to work. But on these roads and the times I drive, you can not really even tap the potential of the 997s.

Summary: I love the TT, but I sort of miss the tossability of the 997s.