That’s exactly what I was thinking- that this was the S.D version of the drills. This version of the A-the step over A was termed by Winckler a velocity A skip and the traditional A skip was an acceleration A skip. Many years ago this is the way I had athletes perform their drills but in the last 11-12 years it’s been with the traditional Mach version.
I think the way Ange performs the drills-A skips, B skips, Ham/Butt Kicks in the GPP download (is that her?) is “textbook” form. I use this as an example to show my athletes when they want a near perfect visual example.