Adam, try this link:
http://www.youtube.com/watch?v=wAZFbsmcB-o
None of these guys have been trained in how to drive. I bet a skilled experienced driver could shave at least a half a second off most of those cars' numbers.
They're all ультра богато (ultra rich) Russians out playing with their toys.
BTW, 2.9 seconds to sixty would be plenty fast enough for me. My 550i does it in 5 seconds and that's actually kinda scary considering the high center of gravity and the sheer weight of the car compared to a Porsche.