People flinch because they are anticipating the shot. Period.

Load a revolver with an empty chamber, spin the cylinder so nobody knows where the empty is, and hand the gun to the shooter who doesn't believe he's flinching on the shot. When he clicks on that empty chamber and he looks like the recoil has kicked his butt anyway...

Same principle. Set that trigger as hard as it will go and watch someone that's been shooting a hair trigger for awhile. The release doesn't go off when his finger tells him it's applied enough force to trigger the release. The release doesn't happen when he expects it, but that bow hand is grabbing the handle and his whole is body is jerking while he's wondering what the heck happened. It's confusing as hell the first time you find out how bad you've been flinching. Been there, done that, got the T-shirt.

And setting my release to a hair trigger is how I got the disease!

It's a lot easier anticpating the shot with a hair trigger so, in my view, most people that flinch have been shooting with their triggers set too light.

Enough of this... We'll simply have to agree that I'm right and you're wrong and then get on with our lives.

AK, one other thing you might do to cure this problem. Get an Answer release from Golden Key Futura. It's supposed to help cure people of punching their release, but I don't see why it can't help with your problem as well. They're both symptoms of the same basic problem.