Wayne, thanks for your opinion. Here is another point of view from a guy who has some experience with the issue. (from the daily sail)

"However Coutts does believe that foil development will be significantly more important than it has been in previous monohull Cups for it seems extremely likely that at speed the foils will be lifting the leeward hull out of the water, partially or completely, to reduce drag. Among the large trimarans competing in the Route du Rhum the difference between having lifting foils and not having them is said to translate to around 4 knots of boat speed..."

You can argue however you like, but the simple facts are that the curved foils are a clear advantage over straight or canted straight foils.

I have sailed A cats with and without curved boards, and to be honest my feeling is that there isn't such a clear advantage with the curved boards. I think this is due to the A cat being more about efficiency and drag reduction rather than dealing with excess horsepower like you have on the F20 and the ORMA 60's etc. Its a very different style of boat and as such the requirements are different.