Taken from Evo:
"Both the Carrera S and Carrera 4S get to 62mph some 0.4sec faster than the equivalent 991s, in 3.7 and 3.6sec respectively. "
I expect there is nothing in it. 2S will do low threes - Supra is at least half a second or more off the 911s pace. Funnily enough physics works roughly as I expected it to.