I think you have a speed issue with that logic Hakan. My understanding is that you need to go at a certain speed before removing the slats/flaps pay off. Just look at a very specialized plane like the Fieseler Fi 156 ( http://en.wikipedia.org/wiki/Fieseler_Fi_156 ).
Sailboats dont move that fast really, and our airfoils are pretty high lift anyway. In my opinion the drag reduction of removing the jib in an unrated sailarea class will probably not pay off. But now we are back to the uni vs. sloop discussion we had just a couple of months ago. Like I said then, we simply dont have good numbers on the question, so we will not be able to close this discussion no matter how much logic we apply.