...In all my years of riding, almost every horse I've ever rode that bolted was lacking in his basic training to begin with. If you teach them a good solid stop from the start, then a ORS as defined by NH gurus shouldn't be needed...
After 3 1/2 years of bolts with Mia, I hired a trainer. After 4 sessions, she was worried that Mia might never be safe, because she reacted oddly. On session 5, she concluded that Mia had never been broke to ride, or taught to respond to a bit.
The implication was that instead of having a very spooky horse, I had one that tried very hard to make things work even tho she didn't understand. So her training started over at the very beginning. It took two months of ground work to get her to where the trainer thought she would be safe to mount. A few days later, I started riding her again.
I'm not saying she will never bolt again, but the odds seem to have gone way down. We're trying to teach her confidence, and that if things get scary, stop! Rode her today around the block and out into the desert. There was another horse, but Mia opened up about a 100-150 yard gap, so it was the closest we've come to riding out by ourselves. We aren't 'there' yet, but it looks likely that this summer will include a lot of riding by ourselves out in the desert.
However, I still believe in having as many tricks as possible in your bag of skill. For military flying, I was taught we all start off with a bag of luck and an empty bag of skill. Our bag of luck cannot be refilled, and we never know how much we start off with. When things go wrong, you can reach into your bag of luck, or your bag of skill...but if you reach one time too often into your bag of luck, you will come up empty - and SCREWED. So the goal is to fill up the bag of skill BEFORE your bag of luck runs out, and then rely on the bag of skill...
I want my bag of skill to include as many ideas as possible on how to handle a bolting, freaking horse. Training may prevent a bolt, but I may not be on a well-trained horse. After all, Mia was supposed to be great for a beginning rider!
But if someone tells me they HAVE a bolting horse, my first reaction will be to ask how much training she has. Both horse AND rider!