Moths sail a typical windward-leeward course. If you want one, buy one. I'd get one but launching off a beach is difficult and foiling in sea state looks really tough. An A-Cat is more practical.

Carrying 2 sets of foils around the course (cat) vs. 1 set (moth) adds twice as much drag, and the initial C attempt proved slower, but it was an initial attempt. I bet 1 fully flying C will show up at Weymouth in 2013 and then we can be the armchair judges.