This is not true at all. You might think you are fast because of all the movement you have done in a given time, but it is the wasted movement that makes you feel fast. Efficient movement is fast, but efficient movement does not feel fast. It's the old saying, Slow is smooth, smooth is fast. It's because efficient feels slow. Without training with a timer, you are only guessing that you are doing better.
Also, you aren't reacting to an outside stimulus. You are drawing when you are mentally ready to drawing. You are not reacting
You say not true at all then go on about aspects that can only be determined through self awareness/analysis, so it is true.... which is it.
And who said I was determining when to draw, I've posted elsewhere about the routine I practiced for years, decades, and it typically included another person determining when to draw, it could be seconds, it could be minutes, it really depended on how much of an @ss he wanted to be that day. Same deal with the number of round he put in my mag, reloads should not be practiced as something predictable.
And please, economy of motion is an age old concept, and it doesn't take a beep box to figure it out. Unless you truly can't self evaluate your movements, and lack awareness of self. Do some research, most people, maybe all, need to learn to be self aware of the details of their movement, and then you need to learn to be self analytical, and self critical. These things are not all that natural. I'm naturally analytical, but had to learn how to apply it to myself. I can see how a beep and timer might help, short term, it may even be easier than learning how to analyzer yourself, and less of a shock to your ego because it's the timer being critical not yourself. But long term and across a broader spectrum of activities, learning to be more aware of yourself is a better investment.
One thing you learn when you figure out how to really look, is there are no absolutes outside of physical laws, so you should never say something is absolute, because it is impossible for you to know with 100% certainty what someone else is thinking, how they will react, or what they are capable of. For example "not true at all" would require you to be 100% aware of the capabilities of every human who has ever existed, and I'm finding that hard to believe. You found the use of a timer helpful, OK. I don't agree. I wish I could have met you before my health issue started taking away what I worked long and hard to accomplish, but unfortunately I can't shoot as well now as I could 15 years ago.