I agree with Jai, for the time being to each his own and everyone should run what they feel like. Perhaps down the road Charlie will make a spec class that requires a realistic GT body and a mod class that is open.
I'll continue to run a realistic GT body, since that's why I'm in this class. Whether you run a cf chassis or a Lola type body isn't going to effect my outcome, I have a hell of a lot to learn when it comes to running with you guys.