if you let main sail all the way out,ie sail is 90 degrees to the wind, you are exposing the maximum amount of sailarea to the wind. therefor, if you sheet in,sail is 0 degrees to the wind, you are exposing the least amount of sail area to the wind, therefore more in control, less healing leverage is applied to your rig.
That works in my Laser going DDW. But at 19+ kts downhill in an F18 the wind is practically in my face, and it stays there unless we start to stuff it (at which point it quickly clocks back). Assuming we keep the front from digging in and the boat keeps moving, the last thing my gut tells me to do when the puff hits is sheet in on the kite. But I'm told this works great.
