Lonestar,
You don't have to be as fast as Master Lee to pull it off. You do have to be trained in how to effect the gun grab and move off line at the same time as well as have the agility to get there. The mindset to make the move is the real big hurdle [ JMusic's self control comment ] for most though, many will not have the confidence to even attempt it to begin with.
You could take a bullet to the arm or shoulder, but if the gun was to your head, you had not business making any move. That would mean the gun went from one positional/height to a lower one and you didn't have a clue on technique.
You could also just be shot in the head while complying. All bets are off when the muzzle is pointed onto your body anywhere. Could well be a mistake on the guys part, might be nervous and jacked up on something, unfamiliar with the weapon, startled by something, any number of things that get him to pull that trigger even if he was not planning on it right then. The problem, of course, is the gun was pointed onto your body and you got shot, no matter what his intentions were or the reason for the gun going off.
Long ago, we were taught the mindset that if a muzzle was pointed at you, you moved, got the gun off your body. The longer it is on your body, the longer you can take a bullet. The expression mentors used was "as long as the muzzle is on you, you are theoretically dead" and so getting the gun off your body is paramount to staying alive in theory and in practical application. They then taught us how to do just that, both from the front and rear.
I would not suggest to anyone to make any move. Thats a decision they make on their own, right or wrong, trained or untrained. I can only speak for myself and I'll be making a move to get the guns muzzle off my body as expediently as possible.
Nothing is easy in life, including the decision to allow someone to muzzle you for any length of time while committing some crime against you. Hard decisions in a hard world. I didn't learn what I know in these types of situations in the sterile environ of a dojo with wiling partners. I can say that I've used what I was taught some 25 years ago somewhere over 1000 times on a multitude of students and brother officers in demonstrations. After the first time, they knew what was coming and still could not beat the action with their reaction to get a round on me.
I've gone to using 38 blanks of late in the drills. That ups the pucker factor to some extent as they will cause serious injury and are capable of causing death. In all the times of running these disarms when the gun is stuck on me or within arms reach, I've been nailed 3 times, all by the same student on the same day and all with blanks while the muzzle was touching my body. I know what is feels like to dig powder particles out of my gut and chest.
3 out of over 1000 times in 25 years. That percentage is quite low, and thats with the threat knowing I was going to move on them and expecting something to happen every time which the real threats will not be expecting, thereby reducing the reaction times.
You just don't know their intentions on the streets while being muzzled with a gun. I prefer not to put my faith in some threats goodness of his heart not to shoot me even if I comply with his demands. I'm not alive by accident, but by training for the real world and the mindset that if I'm going to go, it will because of something I did, not something they did while I hung out with the hope and prayer they let me live for some reason.
Going for a mag release, racking the slide, etc is not something I'll ever try myself while wrestling with a loaded firearm on the streets. It's get it off the body, keep control once the gun is off the body so it doesn't get repointed on me, and get it done. If the gun is not within your immediate reach, you'll have to decide based on the circumstances what the possible options are at that time for you. One of the options is NOT to stand there and be muzzled any longer than is necessary, you control your fate and do something or you let the threat control your fate and do nothing, hoping he is gratious enough to let you live even if you comply. I prefer the former to the latter in these matters.
Brownie