Be an interesting test but what would be interesting is to time the boat around successive courses, I think you would be surprised at how little the differnce there would be.

Certainly the Stealth which I have has got stiffer over time, largely due to better reinforcing around the beam areas, is the latest boat any faster than the older boats, certainly they feel different in handling, but around the race course the oldest boats still can win pretty regularly.

My main concern though is to stiffen a structure then you put increased loadings on other areas which then in turn means they have to be beefed up to take the loadings. I would guess it has to be a balance between immediate pleasure ( better handling ) or long term pain ( increased weight and perhaps less long term durability )