What does "a cat sailor" even mean? Ben is a 4 time Olympic Gold Medalist, match race world champion, and has been training non-stop as the skipper of the Oracle B boat for months. At the level these guys are sailing the transition to another type of boat isn't a huge problem- just look at Ben's performance in the ACWS.
Personally, I think crew work and losing DDR was the biggest setback to Oracle, and place much less blame on JK.
I really wish labels in sailing would just go away!
That's just because you're not a cat sailor...
The sentiment is strong here. Anyone who's spent enough time racing cats would know that the "foiling tack" they attempted, even if it had been properly executed, was a huge mistake.
There have been other, less obvious examples of tactical blunders. I don't put it all on JK, and don't see Big Ben as the magic bullet.