I am not in a position where I can test this theory right now, but the situation might be this:
1. The scanner might default to a delay of 20, WHEN DELAY IS NOT SELECTED.
2. The default behavior (if step 1 is correct), can be overridden by SELECTING DELAY (turn it on) for a specific object, AND SET THE DELAY VALUE TO 1 (or zero if that is allowed).
I cannot test the above theory right now, to prove whether step 1 is correct, nor to test if there is a way to adjust the default delay behavior of the radio.
This is just an idea that you might check if you wish. When I get a chance I'll check the official and ETRM manuals for clarification, and test it with one of my scanners.
I'll try to test and post results later tonight or early tomorrow.
Hope this helps,