I'm fascinated that they can detect the difference between a four seam and two seam fastball. I'm pondering experimenting with a three seam fastball.
Of course, that only matters if you can throw 80 mph or higher.
I have hit a few times off a real 90 mph and the ball makes evil sounds. Fortunately I knew the pitcher had good control.
Even a straight fastball at 90+ moves a lot.
I cannot hit a good curveball, I can hit a hanging curve very well. Hats for bats, keep bats warm.
A right handers curve breaks in to me and I can't pick it up and adjust. Of course I am old. But leave that bad boy out over the plate and whack, I will nail it.