I discovered this feature almost the first time I used the cruise control, and I think the time before it reverts to adjust by 5 again is on the order of 10-30 seconds. I never tried to figure it out exactly though, because that would require actually testing it with decreasing delays (which would be tedious). If you use the short press (to adjust by 1) repeatedly, I think the timeout is just extended, so in theory you could probably jump up and down by 1 indefinitely if you really wanted to.Today I discovered a new feature. So I was aware of two speed adjustment features when in cruise control.
1. Short press, adjust by 5
2. Long press adjust by 1.
Today I found that after a long press, you can continue to adjust by 1 for each subsequent short press. Wish I had know that before! Don't know what the time limit is before the short press reverts to increments of 5 again, if anyone knows??