4100 lbs. almost? No wonder it's just keeps up with the Corvette, it's so much heavier (although I'll admit they're both in different classes so the comparison almost isn't fair). The current Mustang IMO is too heavy, I believe a stock Mustang GT is still heavier then a Dodge Viper. I remember the days when Mustangs barely tipped the scales at 3000 lbs., I'm wondering where all this extra fat is coming from these days. . . I think in terms of acceleration, weight plays a huge part, it's too bad the car couldn't be lightened up a bit. That's my only gripe really, but to come to think about it, the GT500 is coming close to weights that original muscle cars had.