Everything you say is spot on. But there is something else.

Personally, I think the lite boats offer new challenges to sail relative to a heavyweight boat because where,how and when,you move your weight is bigger factor in making the boat go. (At the last trials, the Olympic sailors raved about the M20's speed and responsiveness as being a real challenge)

What some of us are speculating is that the F16 is a bit more sensitive to total weight WITHIN it's range then say an F18. The race results, fleet experience and JC's report support this conclusion.

It will take an Olympic level fleet to figure out if the lite weight boats are more sensitive to weight in their design range and by how much.