In the US don't they have three seperate ratings for each Class dependant on Wind strengths. Thus, given what you've just said Scooby about 49ers etc you could equalise them out a bit better? (Only a suggestion not a debate)
(spent some time on this <img src="http://www.catsailor.com/forums/images/graemlins/wink.gif" alt="" /> ) and it still does not work !
Where ever you put the "wind breaks" in, classes still get hit/make a profit and then they will moan even more !