A bit of an important discovery tonight for those that think Auto Max drives too slowly: the right scroll wheel still works while on Auto.
Driving past a known sensitive speed trap, and Auto Max chose to go 27 in a 20 MPH. Out of habit, I scrolled down on the right scroll wheel, and after about a half a second delay, it slowed down to 24. Another scroll down, and it's down to 20. Another scroll up, and it's up to 24.
So yeah, you don't need to press the accelerator and hope it keeps up. Scroll up on the right scroll wheel a few times.
I don't know if I'm just the first person to try this, or whether others have done it already and I've missed it.