We know first hand through strenuous testing just how they do perform and I did not start this thread to get into an "answer and question, bun fight" session concerning the pro's and con's of some "sceptical theorising" of how or how not foils do or do not work. I have simply posted our FIRST hand experiences of our testing of them "out in the real world", under an enormous variety of sailing conditions. Now any one can draw on all sorts of theoretical situations where they can extrapolate as to "will they do this" or "I feel they will do that" or any thing else that they can imagine, but before "digging too deep at hole" perhaps it would be prudent to actually see how they perform first hand, then these opinions may carry the weight of proof and not just supposition theories.
It’s not just some theory but documented fact that we took the YV yardstick of the 4.3 Alpha Omega from 88 down to 77 in twelve months. Now that was also something that the majority of sailers said was "impossible" as well.