Ashlandchris has nailed it.
The really quick guys could put a 4 wheeled RC toaster down on the start line and make it go quick. I think we've all bought the latest must have car at some point in the past thinking that we'll instantly be 4 seconds a lap quicker. Then reality bites you back and you realise that the weak link is actually the driver.
Since this realisation I have accepted my position in the pecking order