The McLaren 12C and the updated 650S are formidable carbon-fiber monocoque supercars with some of the most advanced driving dynamics on the planet. They are supposedly so good that anyone can get in and immediately look like a hero. A Z06, as good as it is, requires skill to exploit. No surprises the McLaren walked away, even though the all-out track performance should be relatively close.
Z06 vs Viper? Puleeeese.
I may be in the minority here, but I don't give two craps about how fast it is in a straight line. The Zs aero package is very good, and it will walk the Viper on a road course, just like it's supposed to. Anyone trying to drag race a Z06 is using a knife to drive a nail.
I love the C7 and keep looking at one...but for the money, I love my ZR-1 and will eventually pick up something else as a driver.