Has anyone seen what is Audi has done with their S8? NO launch control, just plain traction and power to the ground through AWD and with all that it will keep up with the M5. I can't imagine what the M5 would do with the right xDrive system.
Auto Spies / Motor Trend: http://www.autospies.com/news/Motor-...Seconds-73049/
Bimmerpost reference: http://f10.m5post.com/forums/showthread.php?t=766416