That depends on what your definition of "sailing better" is...
In the current system, after all drops are accounted for, the person with the lesser points IS better...it's been acknowledged as such in thousands of regattas all over the world since the implementation of the current system many many years ago...
This is the problem (perhaps perceived problem) with the new system trying to be implemented for the Olympics, the better sailor doesn't necessarily win if they have a gear failure, bad race, damaged in a collision or similar in the "finals", because it has to be counted...plus you get lumbered with extra points...or have I got it all wrong?
I'm not saying it won't find the best sailor, but I'm sure events will be won by the under-dog many times. Does anyone remember the short-course speed-skating at the winter Olympics when the Aussie guy (who was running last) won the finals because the other three fell over on the last corner...I predict that sort of thing will be prevalent with the new race scoring system.