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.
Regards Gary.
Well on my part of the pond, my experience and observations are the nacra and tiger don't have any noticable performance differences. See how that works!?
Again, it's the teams on the boats not the boat!
Until there is some real two boat testing that includes rotating the teams to the various boats all this talk about one boat being better than another is just noise.