The graphics are phenomenal. But, I think they are... Maybe... Just a little off on this one. It seemed to me that they were showing and describing VMG to the marks rather than VMG upwind or downwind. So, the boat on the short tack looks slower than they really are and the boat on the longer tack looks faster than they really are. It seems to me that much more often than not the VMG wrt true wind would tell the story better. They have the ladder lines already so viewers would have a context for it. No?
Edit: oh great, a typo in the subject line... Sorry.