I think Wouter made a pretty fair argument. I think the windspeeds required by record breaking planing windsurfers make their mechanics pretty irrelevant.
I dont think it would be too hard to figure the drag on the displacement hulls at 40 kt and figure that that much force a reasonable distance up the mast would have turned it over (one way or the other - )
I also know that anyone who sticks their neck out with a logical argument inviting discussion should be encouraged. That is why I come to this forum.
Basicly, if your post knocks someone else and contributes nothing, don't continue, it just makes more scrolling for all of us. Thanks for scrolling.