For those saying that the Mustang numbers are "bs" or whatever, track times don't lie. Motortrend tested the Mustang, Camaro, and Challenger head to head, and the Mustang SMOKED both the Maro and the Challenger. Mustang went 12.7 vs the Maro's 13.1. Handling isn't even comparable, and the Mustang wins in braking and fuel mileage. In the end, in 2011, the Mustang is the winner, hands down, in every category, end of discussion. Congratulations Ford and Mustang. Now stop arguing about it.
Modability? Who cares? With a little money, you could do whatever you wanted to to any of the cars. I mean, you'd have to forge the motor anyway if you are going to make a whole lot more power. Just put lower compression pistons in, and boost here we come. Not that big of a deal. And honestly, you don't "need" a whole lot more power than what the 2011 Mustang makes anyway. I mean, that car with slicks, gears and a driver will go LOW 12s, maybe even crack an 11. Do you really need much more out of a street driven car? If you do, then just buy an 03-04 Cobra, put a KB on it, and roll. This car isn't meant as a "drag car". It's meant to be driven every day, all the while kicking ass and taking names. Keep in mind that it is still pony car, not a sports car.
Oh, and the comment about corrected dyno numbers. I've never seen un-corrected dyno numbers. They are always corrected in some way or fashion on account of heat, humidity, and elevation. I mean, there has to be some standard or comparing dyno numbers wouldn't be fair. Would it be fair if the Mustang was tested in Kansas several thousand feet above sea level with high humidity and 90 degree heat, while the Camaro was tested in Maine at sea level at 40 degrees and low humidity? I didn't think so. There has to be a standard for comparison. I even know a guy that had his numbers corrected down because the conditions were so good that he dynoed in. So stop the bs about corrected numbers.
Bottom line: the 2011 Mustang is a knockout car performance wise, and anyone who disagrees isn't looking at it very objectively. Ford has really hit the nail on the head on this car, and I applaud them for it.
http://www.motortrend.com/roadtests/coupes/112_1006_2011_mustang_gt_2010_camaro_ss_2010_challenger_srt8_comparison/test_numbers.html