Just out of Curiousity... Carbon

I road a 50 year old steel road/path frame (complete with clearence for mudguards and pump pegs !) with airlite hubs and fiamme/mavic sprint rims during track league this year. Didn't notice any difference between it and a modern aluminuim track frame, and I don't think I'd notice the difference between it and a Carbon frame.
I'm sure Chris Hoy would flex my poor frame into oblivion, but for a 4th cat chipper like myself there's isn't much of a difference between frames.

I certainly notice the difference. I was talking more about the OP's thoughts about road use and thinking about weight and aerodynamics but if I compare my TI Raleigh and my Soma or my S-Works.. they're on different planets.

Still, a fast person will make a piece of shit go fast and a slow person will make a £10k bike trudge so it's all irrelevant anyway :)