In August last year on Sydney harbour, the moth beat the all the A-Cats in 3 out of 4 races. The first placed A was Steve Brewin who is a quite handy sailor.
Do you have a link to the event? Not going to nit-pick details but I would like to see it confirmed that the Moth is faster around the course than high-perf cats, when comparing apples to apples.
Never saw official results online and I don't think there were any, just reports posted on SA from actual participants on that weekend.
Biggest problem is that multi-boat regattas seem to be exclusionist between cats and dinghies. So going to be hard to find results. But look at the results on the Rohan Veal link. The first 14 skiff guy is one of the top guys at the worlds. All I can say that once foiling the moth is crazy quick in reality to what you would expect. Going deeper downwind than cats with kites and main sheeted near centre and hiking hard is awesome to do. (But trying to sail in non-foiling conditions is an absolute pain and chore).
