See, I tend to set mine lower than two seconds (1-1.5). I like to have mine go right through to the next transmission so if it stops on "BS" I don't have to hear it for long. If it's a good conversation it will scan right back to it in a second and I can then stop on that TG if I want. Most of the time I don't want to hear the everyday traffic stop in my office so I'd rather it skip right past these. I try and set my scanners up for very fast operation so if I do catch a good one I can just quickly tap the traunk button.
Guess everyone might have different preferences depending on different organizations you follow. I listen to mostly PD/EMS so conversations are GENERALLY quick. I'm sure if I wanted to hear milair or rail I might opt for a longer delay time in order to hear the full conversation.
Good question- never really thought of making my time longer- might try it to see what happens.