So where's your proof for this claim again? And why would anyone go to 160MPH on a highway? Unless you're clinically retarded or just don't care about putting other drivers and yourself at risk...
Also, your argument about higher trap speed is rather exaggerated. The GT-R traps at 124.8 at the 1/4 mile, and the GT500 at 125.7MPH. Big whoop.
Also funny how you mention the GT-R is only as good as it is because of AWD, yet you completely forget about the fact the GT500 has needed 100HP more than before to get to where it is. So could I use the excuse of the GT-R having more than 100HP less as to why it was less than 1MPH slower on the traps? "It can do 200mph stock and will trap higher in the 1/4 mile, but only because it has 100HP more than the GT-R and weighs a lot less". Oh, you don't think that's fair now?
In the end, a Z06 with the Track and Carbon Package and a GT-R will bitch slap the GT500 at a track, which is where it matters. But they also cost nearly $40K more, so the GT500 is undeniably good at its price.
But a GT-R or Z06 it is not, especially since it needs 100HP and 150HP more respectively than what the GT-R and Z06 have to post comparable straight line speed and it will still be left in the dust when it gets twisty.