Now, one thing that has not been stated is the fact that, we are not trying to get lift off of the hulls (unless you sail a 16), so there is no need to produce lift.
I have crunched a few numbers (Reynolds, viscosity...etc), but do not have time to finish the stuff tonight... probably tomorrow....
In short, a sharply pointed bow is LESS efficient than a wider one... (Hobie 20 vs..say Inter 20)... explaination manyana
Will R