I understand how the standard servo library works. I wish I could make a video tonight to show you. It works just how you described. Each step is 70ms time by default. My function tells the servo/stepper how 1/far to move each 70ms. This is the 1/speed also. It is easy to convert the standard servo library commands to my format using Excel. Here is an example of the array (script) for servos.
{100,100,200,200,100}
This tells the servo to move at speed (distance too!) - 1/100 for 140ms, then 1/200 for 140ms, then 1/100 for 70ms.
In the case of a stepper in uses the "speed" as the delay between steps. It's actually 1/speed.
The observed output appears exactly the same for a servo or stepper, you can't tell the difference.
Unless you try to move the servo too fast.