I couldn't agree with you more, Gary. I believe too much emphasis is placed on the hulls, rather than the rig / sail combination (and of course, skipper's ability!). Providing the underwater gear is in good nick (foils / blades), then the hull shape is only going to make a very small difference - such that an error in a tack will more than blow any hull shape advantage.
After all, how many new boats also end up with new sails? Is it then the hulls, or the sails that make the final impression?
Cheers
Steve