"What a load of CRAP.... the coriolis force has nothing to do with this."
No, honest! In the Northern hemisphere all water drains down a hole clockwise, and all sailboats will go faster on a clockwise tack because of the same thing.
In the Southern hemisphere, the water drains widdershins (counterclockwise) and all boats go faster on a counterclockwise tack. That's how DC lost the cup to the Ozzies the first time, he forgot how things work differently down under!
Gee, Saildog, I thought everyone knew that!