Turns out he does! I opted for a face-to-face though, and I transcribed his response:
"God dang do I hate these picky professional pinball dorks!
Ball is brand new. Playfield is super-clean, polished, and waxed.
This was a recent addition to the location, so as is usual for me, there are still some kinks to work out. I've recently decided to pay more deliberate attention to setup details of my locations EMs. I want to be able to be able to offer the same quality of gameplay as I can on solid-states, and I also want to be able to preserve the gameplay as intended by the designer as much as possible. It's obvious that there will be room for improvement until I'm a pile of dust underneath a moldy relay board.
Part of this process has been to start them all off at the only manufacturer-recommended pitch for EMs I've been able to find, which is 3.5. I knowwww, so floaaaaatyyyyyy. After a week or so, if it seems like gameplay might be improved, I bump it up .5 or so and observe.
I will be raising the pitch on Amigo before next league night :)"