Recently in a light-air frostbite, I was one of three lasers sailing dead downwind abreast two-to-three boat lengths behind the race leader. I fully expected the leader to come to a dead stop for all the blanketing he was receiving from the three of us, but quite the contrary, he pulled away a little. It was a cool day, flat water, and a wind about 2 knots. Anyone have a reasonable explaination for this one? He did not show appreciably better speed in the other races and one of the three of us was a former masters world champion, so I think it must have to do with wind patterns that I don't understand. In a conversation with another local sailor, she suggested it might have and to do with the interaction of the wind layers above cold water. Any thoughts?