Which tack is your fastest?
For all the time I've been windsurfing I've always been a few knots faster while sailing on port tack. I'm right handed so on port tack my strongest leg and arm could take action where it's needed: on the aft part on the boom and in the rear strap.
Quite interestingly it seems to change now. The last year I've had all my fastest runs on starboard tack. Strangely enough in a quite upright position!!!
Did equipment change so much, that the traditional low weight lots of muscle power isn't the right way any longer (I got myself an iSonic 122 last year)???
I've noticed that lots of speed champs break their records on starboard tack...