Its not training how you fight, its training bad muscle memory. You cant train for startle nor should try. If you train your body to put your arm up, blocking your line of sight, then practice it that is what your body WILL do. Its not the boogy man, its someone that wants to kill you covering your eyes wont make them go away. If you practice your draw, correctly with hundreds of repetitions, that will become muscle memory. Then that will become your "Startle response". Everyone do me a favor, and NEVER practice this. This concept is just asinine. Train on your draw, have your working hand vicinity of your chest (not your eyes) so if you have to go hands on its there, and ready to receive your gun. That will create muscle memory, muscle memory is what your body will do.
Also, when the gun comes out of the holster you should have your grip. In the pic with HairMAn, if he had to shoot as soon as the gun came out he coudnt, as soon as the gun is out of the holster it needs to be ready to go, you may have to fight at 1ft, or 15 ft but you need to be ready for both.