You have no idea how some shooters pay attention to the RO's timer cadence. It's a real thing. One of the things I learned early in my RO career, right here on these forums, is to stagger your count so shooters don't know in advance when I will hit the button. I still stay more in the area of 2-3 seconds. I never short beep and rarely wait 4 seconds. 4 seconds is a long time. LOL