Wouter,

I do not want to follow you in yr math models.

On the contrary if you like i can provide you with many regatta's results, DEMONSTRATING what I stated, that is the F18HT cats won on elapsed time many open events both round the buoys and long distance, both on the sea and internal waters, beating all 20' cats including Tornados. Perhaps they did not win olny Texel.

Maurizio