If it was tour quality, it would be on the tour. From what it have seen, it don’t think it would be any more accurate than other swings. A 3/4 length backswing would produce at least the same power and be as accurate.
I would not teach this method to my kid either.
The swing has less movements, thus less variables, so by definition it’s simpler and more repeatable than a traditional swing. This means consistency.
I can’t prove this to you because I’m not very good at golf, and I’m definitely not good with the traditional swing.
Since the JV swing is a far simpler swing than a traditional swing, it would be easy for any scratch golfer to learn and show some videos with metrics.
I’m not interested in selling the swing. I am interested in knowing if it’s a swing that’s tour quality - only because I have two young kids interested in golf and may teach them it versus traditional lessons.
105 mph for a young man is not fast. 118 mph for anyone is fast. 110-112 mph hitting it solid and launching it properly will get you 280 yards in the air, all carry. Striking the ball on the screws at the proper angle will yield more fruit than more speed in most cases.
I do agree though, HC over 18 tends to be slower speeds (under 100 mph). In all my years playing and caddying, not too many 18 handicaps hitting it 280 and many golfers have no idea how far 280 is. I think this is the problem although chopping down with the right side, reverse weight shift, losing the lag, slapping and flipping doesn't help them, either.