Not sure if it has been mentioned, but "SOME" sailboat hulls do not follow the rule of the 1.34 time sqrt of WL. many of the newer planing hull designs are like power boats, you CAN go faster than the formula. On the otherhand, take a boat like the Pinta, Santa Maria, old ironsides etc, those will be lucky to hit the formula, and if they do go over, some designs DO sink into the water and eventually sink! I would SWAG that most boats built in the last 30 or so years, some as far back at 50-60 have the ability to go over the theoretical hull speed.
She drives me boat,
I drives me dinghy!