This Audi vs. BMW argument reminds me something I just watched. It was one of those Japanese video magazines devoted to performance cars (I think "Best Motoring" Vol. 7, 2000). They had an M5, one of the AMG Mercedes, and an Audi (I forget which model but I can review the tape if anyone's interested). The professional driver drifted the M5 (it's something to see an M5 wagging its heavy tail but under total control) and the Mercedes through a series of tight corners and gave both of them his highest mark. The Audi, by contrast, just refused to drift and it got a middling rating as a result.