[RedDevil]

Yes, but it is quite far removed from the notion that you can sail faster downwind than the wind.

Rick Cavallaro presented his ideas in a yacht club, where most sailors are all too aware that you can indeed sail downwind faster than the wind by tacking (provided the yacht has low drag, like a catamaran or an America's Cup racer).

But even a really plump boat like the barges we used in the yearly Water Scouts races is faster if you don't go straight downwind but tack mildly; just not faster than the wind, but they never are.
I could hardly make up places tacking upwind, but I did win some positions doing just this whenever the next buoy was straight downwind.
A sail is so much more effective when the wind blows over it like a wing rather than just acting as a chute.