I think you will find that the manufacturers designing the latest supersport and superbikes do initially design them as and with racing in mind. So basically..... they would have been designed as a racebike first.
Do you seriously think they spend millions of yen designing a road bike, then think, 'hmmmmm, I wonder if its gonna be good enough on the track to win races'..... Course they dont
Racing is where their product is out there, in front of the public, self advertising. If it does crap on the track, then punters may be put off, if it does well, then punters take interest. The bikes you buy from the shop would have been in race trim doing 100's of miles on a test track to see the potential they have come race day. Then, the lights, road ancilliaries and cheaper components would be bolted on for the bike to go on sale and be homologated. (obviously after testing and fine tuning)
They cannot afford to make a bike that is predominately good on the road, but impossible to get up to speed on the track, it just wouldnt be worth their while.
Look at Kawasaki now with the new ZX10... No one has even seen the roadbike, although Kawasaki are quite happy for the press and public to see the racebike they have been testing for 2011.
So....the race bikes do not derive from a roadbike with a full fairing.... The road bikes are derived from racebikes. Just made softer and more practical for us mere mortals.
On a different note.... The new suzuki 600 & 750. F*ckin boring!! Yet again!!!