http://www.dupontregistry.com/search/srDetails.asp?itemid=149053&sessionkey={CC93F7C6-0E4B-4C3D-AF37-9C8764013A38} Check out the wing on this 996.
You can mock it but wings like that on those cars are proven track worthy. Some of the ones you see in the Open Track Challenge and such are even bigger and nastier. Consider the Porsche design, a good chunk of the engine is BEHIND the rear axle. You've got to do some pretty funky stuff to make those cars truly drivable at the limits. Ugly as all hell but you have to respect someone who's willing to make their beautiful car that nasty in the name of proper performance.