I always knew they were fast, but until that video, I'd never seen one race upwind. I'm surprised they do so well on what is supposed to be "our course" ie. windward/leeward. That's why I was wishing they had put a good, fast catamaran in the mix too.
Yeah, I'm pretty surprised at how well the kite goes upwind too...that's pretty cool. I'm not sure I want to see the catamaran against the kite, honestly.