Hey, I ain't knockin' Jerry! The dude is the fastest shot string shooter in the world, period, bar none, end of discussion.
Even if his technique looks wacky
.
I will point out though that you can't always extrapolate a truly world-class shooter's personal technique to the general population. There've been some spectacular failures trying to do so. The most extreme was when the FBI tried to emulate Jelly Brice, likely the single most dangerous combat handgunner who ever lived and thank God he was with the good guys. The dude used to personally do solo what we use whole SWAT teams for today, and killed a LOT of goblins.
Problem was, turns out most people can't hip-shoot the way Jelly could. A lot of FBI agents died doing the "FBI crouch" he taught 'em. Oops.
I'm not saying for sure that nobody else can get Jerry's "funky chicken Isosceles" down pat...but I'm also not betting it'll come naturally to most people in a fight.
As good as Jerry is, he's not combat tested that I know of.