Alot of this disagreement is very weather dependant. But to clarify a two up boat will mainly be heavier than the single hander, so when I say they tack, gybe slower I'm not talking about crew work but the fact the Cat will slow down and then have to speed up again. I believe due to less weight single handers carry of these manoeuvres quicker. I would agree that a good Gybe from the wire is slower but that also goes for the two up teams as well.