Yes, you’ve seen this movie before. And yes, even with 540 horsepower, to some a Mustang is not, strictly speaking, a sports car. A sports car, by the classic British definition, is one that can, in a pinch, be raced. But times change, and even our resident hotspur Brit, Mr. Gillies, thinks this is talk that predates his birth. In its most recent encounter with a Corvette—July 2006—the super pony