Pretty much all down to the rider i think...
I once read an article where Sean Emmett took on a confident road rider who had a few trackdays under his belt (on a closed track session). Sean beat the guy who was riding the current Fireblade on an Suzuki GS500 (DAS bike) by miles, he then went round the track on an Aprilla RS125 (road spec) and also beat the guys time.
Rider skill makes the difference to times, makes me laugh the guys who come into my Dad's shop and ask for the limiter to be removed from ZX-12's and the like....doubt they ever get near 180mph on the track.
