[Dave at Pelican Parts]

I agree that the likely culprit in this instance is the ignition switch itself--the fact that the behavior is different depending on how fast you move the key certainly points in that direction.

However, I disagree that rigging up a remote starting button will show if it's the ignition switch or not. When you rig a remote switch from the battery to the starter, you are bypassing a lot more than just the key. Everything from the battery (+) wiring, to the relay board, to the ignition switch, the wiring back to the relay board (and through the seatbelt interlock relay if one is present) and to the starter. Any one of those things that are bypassed could be at fault, and yet a remote switch would still crank the starter motor.

It does, however, check the ground part of the circuit, as well as the high-current circuit from the battery to the starter.

--DD