Flingblade,
When shooting a psychotrigger, the movement that gets you there should be your entire world. When I shoot a tab sear, I draw back and aim, then I put my thumbnail on the sear. Once it is attached to the sear, I am concentrating on pressing it so intensly that I can feel it moving, just like feeling your back muscles moving when pulling through a clicker. I just keep the movement going until it pops. The gremlin is waiting to release and the pop of the sear gives him permission to do so. If it pops too fast, I don't release. If it is taking too long, I don't release. I have made the decision to only shoot the shot if it is perfect in concentration. That perfection will be recognized with a time frame as well. If it pops too soon, I was not fully committed to the shot yet and I let down. If it is taking too long, I was committed to the shot, but something in my head is keeping it from popping. That too is recognized by a thought of "Man this is taking forever." I am able to recognize that thought and let down.
So it really boils down the committment to the shot. If it pops before committal, let it down. If it pops too long after committal, let down.
If you shoot a shot that is perfect in concentration, you will be able to recall specific details about the shot. I.E. the movement of your thumb, increasing pressure on the sear, and ultimately what you were thinking about during the shot.
So to answer your question, my release happens as soon as my mind realizes the sear popped. It is virtually instantaneous, as it should be with any psychotrigger!!!
JT