I still don't rate a car on the 1/4 mile anyway. I have a 2004 Black/Red M6, and what I love is a cruise down the highway when someone decides to provoke a response they wish they never got. Leaving em in the dust is great with the top end.
I've felt from day 1, the GTO needs wider, stickier tires, but that's also an issue with the IRS (I believe). This is why I'm eagerly awaiting to hear some concrete proof if that GTO concept is ever making it's way to the streets...looks like it's sporting at least 275's for width. In the interim, I'm pondering the Toyo Proxes F4's to hopefully resolve this issue, along with a larger rim, and maybe a 255 width.
Back to what I was saying though, starting off at 65-70 mph then putting your foot to the floor will show many what the real oomph is behind the new GTO. Hopefully within the next few years, they'll get the initial wheelspin issue taken care of...it'd be one less reason for somone to boast about the mustang over the goat. Just remember, the GTO had a higher speed in the 1/4, showing that it'd overtake and leave something behind shortly thereafter.