I'm in here late but I'm going to tackle a lot of posts for the hell of it.
Independent rear suspension does not equate to an automatic improvement in handling. NASCAR's been proving that you can pt 800+ H.P. to the pavement on a road course without it. Cost? Sure it'd cost more, but the Mustang engineers haven't yet proven that the extra weight and cost of IRS would see dramatically improved lap times over the current set-up. If there was a viable alternative, don't you think you'd at least see an aftermarket version of IRS available?
The Snake emblem is off to one side just as it was on the original Shelby Mustangs. It was actually moved to the opposite side from the '09 version to allow better airflow to the intake.
You may very well see a turbo V6 in a Mustang soon with Ford's new EcoBoost engine. Bet on it.
This iteration of the GT500 is the 12th fastest lap holder at Laguna Seca after tests by Motor Trend magazine.
As for track speeds and top speeds, 99% of people will never drive a car like this to its limits anyway. Most of the people that own cars like this live for the bragging rights because they're not capable of backing up those numbers themselves.
That's my 2 cents. You mileage may vary.