Attacking a prone figure - adjDX for both time of attack and to hit?

[RobW]

We're strictly RAW on this, adjDX applies to order of action and prob of success (other than range penalties).

For us, this is for the "fun" argument, it means positioning is really important.

But if you want a realism argument, it is psychological law that more difficult actions take longer to plan and are slower to execute. Fitts Law is an example. Trying to hit a small target is both harder to do and slower to execute than trying to hit a large one. I'd be happy if range penalties did slow you down, that would make perfect sense IMO. Shooting at a distant target, you will be naturally slower. Deliberately speeding up will make you even more inaccurate.