The 997S posts pretty impressive 0-60mph times because 1) At 3,300 lbs. it is relatively light 2) It uses fairly wide and very grippy lightweight low profile non run-flat tires and, most importantly, 3) The weight of the engine in the back naturally helps press the driven tires into the ground for enhanced grip on launch.
But as onerareviper accurately observed 0-60mph times are largely meaningless today. It should also be noted that even R&T observes that the margin of "victory" for the 997S falls within a statistical margin that makes the Viper's 0-60 mph acceleration results identical. In the 997S' case the best analysis of acceleration is to look at the 1/4 mile time (12.3 secs.) and, more importantly, the trap speed (114.8mph) which gives you the best picture of things. The Viper posted a 12.1 sec. time at a telling 119mph. While the ET was within probability margins the trap speed was clearly not. Stock for stock a 997S cannot hope to take an SRT-10 from a real world roll-on.
That said, I would avoid goading the upcoming AWD 997 Turbo into a 1/4 mile race. Strangely, though the European makes like to make fun of American cars as unsophisticated straight line drag racers the very nature of the Porsche 911 actually makes it the better 1/4 mile drag car while American cars like the Vette and Viper have braking and handling evolved to the point that they can, as was recently demonstrated by Road and Track, defeat Porsches on the racetrack.
Stranger and stranger.