As a boater that both sails and powerboats all I can say is GIVE ME A BREAK. You really expect someone to worry about which side they are going to pass you on?!? I haven't seen anything in the CG regs that say anything about passing on the windward side. It's hard enough navigating around sail boats that will tack at any time and not even bother to signal. Sure the overtaking boat is the stand down boat but lets be reasonable.
No wonder powerboaters think sail boaters are idiots.