"I don't really see much in years of being around horses unless there's papers that show recognition.

Showing awards at higher levels. Completed rider levels, coaching levels... all that fun stuff.."

Been there, done that, too. I still train with a coach, attend clinics, read everyting I can, etc., etc. That's what serious horse people do. Point being, there are not a lot of absolutes in horse training. One method isn't necessarily going to work with every horse.
A rider needs a repertoire of tools- a squeeze may remind a well trained horse of his manners. A pulley rein may give you the added leverage you need on a particular horse. If there's room, circling is ideal. One rein may alter the horse's balance enough to get its attention. You need alternatives to regain control.
Just a note of caution- a confirmed bolter, like a confirmed rearer, is a very dangerous animal indeed. These methods don't work- it can run full tilt with its nose on its shoulder (or lock its neck so it simply doesn't turn.) Rehabilitating one is a very long, back-to-the basics, no guarantees proposition.