After years of shooting 1911’s, I could go from an armpit or chest index, punch straight out, and be on target. Glocks pointed high. This was remedied by bringing the weapon up into my line of sight then punching forward on a level plane. I can cheat with 1911’s, Glocks wont let me. Well this may or may not cost fractions of a second, it’s still faster than pointing high and trying to level out, stabilize, and find the sights. Because if I do I tend to bob the front sight back down, then back up.