Agree with both your points. I'd also add that depending on how the motor is synchronized, there may be a limit to the initial acceleration so that the motor can stay in sync. At least with some permanent magnet DC motors, the drive must be turned off during a small time window so the synchronization circuitry can operate. These windows are controlled by computer and during initial acceleration from a dead stop it can be hard to accurately time them while keeping them sufficiently short.Nubo wrote:Be wary of using a "butt-dynomometer" to determine acceleration rates.
There is a slight lull when accelerating from a dead-stop. Imho this (initial slew rate) is done to protect the drivetrain.
Finally, the derivative of acceleration is jerk and minimizing it will reduce the stress on the mechanical drivetrain.