Hi Frank,
I guess I always liked the 39's hull form better than the newer generation-just a bit "sweeter"-again IMHO. And while I am loathe to disagree with Martin (never a smart thing), and I agree with his explantion of why the B came into being-but I still think it produced a nice, pretty boat that had some of the best features of the 39 with a lighter, more airy cabin. I think the overall look of the B is pretty-but hey, that's just me.
On the topic of performance-I think Greg said the FD was faster in lighter air due to the taller stick. That may be partly true, but I would put my money on the FD for other reasons-even if they had the same sail area: Lower CG, Less windage, Less weight (overall and in the ends). I think side by side the FD will always have an edge-and because of those factors I think it will actually do better (relatively) the windier it gets! Again, lower CG, less weight, etc..
That does not mean the 39B is a slouch-it ain't, but we do have to be realistic-and since I could hear the blood draining from Lew's wrists after the brutal attacks, I had to at least partly come to his defense!
Cheers,
S