Simon, I dont have the numbers, it is just personal experience sailing with the Hobie 16 against F18 and A class and Tornadoes the last two years in varying conditions. The only times we were able to get into the first three places was 15 kn++. I changed class because of the H16 rating and with the F18 I am much more competitive. My personal impression is backed up by a race last summer where the H16 European Champion and the third in the SA H16 Worlds placed 6 and 7 behind A classes and Tigers that are not even top sailors at our national level (lightish conditions).