actually the lower the dwell the better effeicney you will get. I think they just meant that if you are getting inconsistant results at the chrono it could be helped by upping your dwell, as it may be too low.
Right now the best dwell seems to be 10-12 for the PIMP. Stock is 15 for most pimps which allows it to shoot better for break in period
Debounce, or in the Ghetto board: ETS - stolen again from was manual since i had it open
Debounce is the amount of time the trigger switch must be stable in the up position before checking for another trigger pull. This time is measured in milliseconds.
If you find that your marker is double firing, increase the Debounce time. To make your marker fire faster due to being more responsive to the trigger, decrease the Debounce time.
The PIMP maunal covers these topics breifly as well