Glenn indicated to me that the new big head sail that he used on the new boat was only to make up for the area they had to take out of the bottom due to the shortened distance from the traveller to the mast on the new boat. He said his standard profile is still the benchmark until it is proven otherwise and profiles would remain the same as the current 09 worlds sail. They have offered a new med sail(14) to fit between the standard and big boy models (I think he said it was the same sail used by Spithill at the worlds?) he said all three sails have the same profile and just a little extra depth added as you step up(seam depth not luff curve)