Bottom Roughness
The roughness of the bottom is very important. If you leave yours in the water it most likely has something like Pettit Trinidad or equal - not exactly smooth. If he had bare gel coat this will give him a substantial advantage in less drag. If you both had centerboards, if his had the centerboard trunk sealed off and yours wasn't this would be a factor also.With regard to crossing tacks in front of you, I don't consider this necessarily rude so long as it's not a dangerous situation. Just because one has been sailing for a lot of years doesn't necessarily mean they are fast sailors. Have you been in races and how well have you done? Sailing a boat isn't like, say, driving a car (or power boat) where all one has to do is put the foot on the gas to go faster, it's much more complicated than that.The racing forum might be a good place to ask this question too. If you can give some more details and converse with them, answering posts like you did here, I'm sure you'll get some good imput. Reading articles and books on sail trim etc is really useful too but practicing on the water is what really helps.