...............what???
I can picture the faces of my players if I tried to explain outfield technique using 1/10th of what they said.
I don't doubt one bit of the validity of what this article said but it also shows the problem with letting scientists near sports. Playing outfield is more complicated than what they perceive it to be. There are many factors that go into making a play as an outfielder and as TR says the best way to do that is hit them 1000 some flyball and groundballs. You can drill all you want and it will help but you won't put it together until you get in the big green field and run around.
I don't have a problem with the glide technique if nobody is on because sometimes it's easier to just time the ball. But the best way to do that is to hustle to the area where the ball will come down and then glide with it. Not to glide to it off the bat.
If there is a runner on base anywhere then you got to hustle, find the spot and work from behind it to create momentum to the target. If you glide here a decent baserunner will take advantage of you and move up a base.
So both methods have times and places they can be used effectively but not sure with all the variables involved you can just let science say "this is the best way".