I don't see that his score in anyway takes anything away from the point the guy is trying to make. He set up a new account and played the game with starter clubs and balls. The program isn't going to improve the distance the ball travels or the precision of the clubs. His +1 after 3 holes is irrelevant, as is the exaggerated reduction in meter speed.
The fact is that with this program, the knowledge on how to tweak it and the top clubs and ball, a player could successfully score ridiculous numbers game after game. The only caveat I'd throw in is that the player still needs to know how to putt proficiently. If they cannot read a green then they will still miss putts others will make.
I can only draw conclusions when I assess how this program would improve my game. Even in the lowest rounds I have ever shot, a few 53s, I have always made some basic error that could have been avoided. There has always been at least 2 holes where I have not made birdie. There's always some loose shots that see an approach go to 20 feet or miss a green. With that program I could eradicate these lapses in concentration of that I am sure and I would hole more putts. When on a great round it is missing the ding on my putting that also sees needless shots thrown away.
People can ridicule the guy but I am pretty damn sure that in the hands of the right persons it could make them extremely difficult to beat.