Any magazine will give you 127-132 mph, any magazine... Just go to the one you've got with the 12.2 in it, and you'll see a 127 or-more mph trap speed associated with it... And why are you even COMPARING Ranger's run on DR's, what's the point in apples/oranges comparisons?? Stock vs. stock on street tires, period. Once you start messing with things, switching to a drag tire, it's a who-cares discussion.
Yes, on a road course, they are amazingly close. My only point was that from what I've read, the Z06 is capable of running close, but far tougher to drive at that level. You could give a GT one heck of a run, but one slip-up and it could bite back hard.
To say that the Z06 is faster than the GT just because Joe Blow ran a blah-blah with race tires and who-knows-what-else isn't being divulged would be ingenuous. To say that it's close enough to save $80 flippin grand is eminently VALID.