Re: F18 performance.
The fact is one design of hull has to be faster than another. All you have to do is look at Hobie versus Nacra versus Capricorn the shapes are so different.
From my experience racing against and talking to the top sailors in OZ on all 3 designs, the only time the Nacra is competitive is in light winds and the Capricorn is probably quickest on average. The only Tigers that beat the Capricorns in OZ are the best in the world and beat the same sailors when they sail other classes as well.
As a racer in OZ, I realy enjoy reults and regatta reports that list, brand of hull and sailmakers against the crew names. It's just more knowledge about what is going on out there, we are a long way from the rest of the World and I don't like to believe everything I am told by adverts.
Regards Gary.