This is what he said...:
ORIGINAL: khkim0102
#1. When I give just a little bit of throttle to move the car very slowly, it does not move smoothly. The motor and the gears sputter. But if I give a little more throttle, it does not sputter any more and goes smoothly and faster. Sputtering occurs only when the minimal input of the throttle is applied.
The words
"little bit of throttle" and,
"very slowly" make me think he only using a little bit of throttle, and making the car move very slowly. I can also reasonably assume when he said
"if I give it a little more throttle, it does not sputter any more and goes smoothly" he means that when he give it some more throttle the car stops sputtering, and moves smoothly.
Both of those are pretty much the definition of sensorless brushless cogging. Stuttering at very low speeds, with very little throttle input.
So I guess I'm not seeing the part that makes you think he talking about off the line acceleration.