I'm told that the lift of an asymmetric will be noticeable if the spin pole is longer than 50% of the mast. I'm not sure if that's the total mast, or the spin hoist height (the latter would make a bit more sense.) My P-19 has a 15'4" pole, 27+' hoist, and lifts a lot. All the skiffs (12's, 14's, and 18's) seem to run tremendously long bowsprits, and typically sail downwind with a LOT of the front part of the boat out of the water.