I'm guessing the curved foils do unload the leeward hull some, it definintely doesn't get on the foils and foil however.
Yes the curved foils do push up the hull and make it plane!
That isn't necessary slower as foiling. Getting on a foil induces a great amount of drag and only if you can adjust the angle of attack of the foil (after you are foiling!) you might can go faster. ( =Reducing the drag and increasing the wingforce).
Besides that, planing on a full sea is dope.
