I have a friend who has pulled off F twice now. The first time he took on alot of water, but the second time he was more on the back of the board.
What we did was: he started out about 20ft off the boat, pulled himself into the wake and then throw the rope to the other side of the wake. Then when he felt it, he balanced and popped up. Another trick to help him we go a little slower than normal until he gets up. Not talking too much slower just 2000-4000 RPMs slower is all, but he claims it makes it easier.