this stuff is pretty interesting. In the picture Tony showed, they appear to have a traveler on the front beam - presumably to help add leverage to prevent the kite from flipping the boat sideways.
That Supercat in that video was hauling butt! And those guys do look terrified. I did see a few frames where I thought they might be trying to go to weather and it looked really slow.
Are kiteboarders really going to weather that well now? I had no idea they were able to go to weather so well.