[AndreyATC]

So far it's been low 4s, like 4.0, 4.2, 4.3
Not sure i've seen 4.5, unless you're talking about BMW's own numbers, which are always underestimated
555HP + AWD + Launch Control = magic

I'm more surprized with 1/4mile results though, 12.5 sec???
Wow!
Current M3 gets there few tenths later