Let me defend the Super Snake a bit here as I've seen one race first-hand for three days, along with a new Dodge Challenger. We were doing 1/2 mile shootout racing, and here are the MPH results for the Challenger, my car, and the Super Snake.
2008 Dodge Challenger - 124 MPH
2006 Mustang GT (Saleen SC) - 134 MPH
2008 Shelby Super Snake - 150 MPH
My car is making 540 HP compared to the Snake's 725 HP and the Snake had me GREATLY covered as you can see. The Challenger makes a lot of power and looks beautiful, but the overall weight of it just slows it down.