hmm - i disagree about the Camaro coming out as a sports car. I think it was a pony car from day one. It was no match for a Vette... or at least no more so that it ever was/is.
I think the m3 is tricky too. I'm inclined to put it in sports coupe (along w/ the Skyline, M5, Astons). While the m3 is awfully close to sports car performance, it really isnt' going to touch a Vette/Viper/Etc. (did you see 24 hrs. at Nurbergring this weekend on Speed?).
Ryno - I can make a Civic that will beat the pants off the HKS HIPER Shit in hp/cylinder or litre. That's not the point. If the HIPER Silvia were all that, it would be winning Nurbergring, not a Viper. It would be doing LeMans, not a Viper. But it ain't, is it? a) your seat of the pants impression is much less important than that of the automotive journalistic and racing community ( <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/sneaky2.gif" border="0" valign="absmiddle" alt=':evil:'> no harm intended); b) the test here is stock, not tuner cars. Mustang Cobra? Naw - still has the fundamental characteristics of a pony car (see also, Camaro SS).