Come on guys are we really still arguing about this? The thing has already run 11.81 @ 123 mph, on stock rubber its first time out. That's faster than the fastest recorded stock ZL1 run.
It just dynoed at 609 WHP from the factory:
I really don't think that somehow, a car that's 350 pounds heavier and short 80+ horsepower is going to beat the GT500. The GT500 is definitely more towards the Z06 end without the Z07 package performance wise.