When I first mentioned Randy's new main, I said it was different, not radical, think it was Tom Siders who hung that label on it.
When Randy first mentioned it to me I ran a couple of aero run's in the computer on it. The main benefit that I could see was not so much that you got more power from the sail, but that you should a fairly good chance of reducing the overall drag by a good margin and that would help your point. In addition, you'd probably be able to get the top to fall off easier in the puffs. In addition to the tip, he added a small sweeper to the base to starighten the flow there and I believe that this was a useful addition, again, not for power but to reduce drag.
Couple of computer comparison pics attached.
RG