As a daily Mac user for about 13 years now I have no idea what phenomenon you're talking about.
For any program that is open, even if it hasn't been in use for a while, I click it once, and it comes to the forefront immediately.
For programs that are not open, I click it once, and then if I wait for it to launch, it appears in the forefront. If I immediately click back over to my web browser and begin using it before the program launches, it does not appear in the forefront... because I interacted with another program after starting the launch.