I do not want to defend 997 Turbo since that car is IMHO underperformer on the track.

Just... Recent Motor Trend track comparison test on Laguna Seca... GT-R was just marginally(0.4s) faster then Audi R8... On Vairano Alain Prost was much, much faster in Lp560-4, Scuderia and GT2 then in GT-R...

If we look at recent car press there is no doubt at all-UK press is strongest advocats of GT-R.