I didn't try this move with a pivot slip, because I don't think he was demonstrating a pivot slip, but when just sliding down the hill I noticed some changes in the pressure of the uphill / inside ski.
I didn't try to make a turn with this move either, but I will tomorrow.
When I decided to finally pay some attention to PSIA a couple of years ago I heard a lot of things from different people (if you can imagine that). haha Some of which were high edge angles before the fall-line, high C and someone said to try to pull your foot back to reduce tip lead. Boy did I. I found that my radius would shorten just a little more right at the end sending my COM ahead. I was overdoing it so much that I started doing it in the high C and progressing it through the turn as needed, which is actually the NIS instead of the NOS. Sure enough I found that I could find really high edge angles in the high C, but it didn't allow enough time for counter, which was then created in the lower leg. It felt super dynamic but joints aren't meant to handle loads like that. The real kicker is when I was watching some video of me doing this and It looked like I was teleskiing!
Fast forward to yesterday - playing with counter.
Initially I experimented with this later in the turn not focusing on high C. What I found is that a little more tip lead at the right time allows for more counter. Needless to say a pullback of the inside foot too early makes it very difficult to get STRONG counter. Once that counter was established it was very easy to shorten my radius with more angulation. In fact, too easy. I didn't leave two clean RR tracks, I left trenches. It honestly felt slow and made me feel a little over flexed for the transition, but incredibly strong compared to the lower leg tipping sensations. The first thing I thought of is, "this is how the guy in the "How Long To Carve thread" is doing it.
These pics should give you a good idea of what I'm talking about (*embarrassing as it is). In the second pic you can see the pullback begin just after the fall-line. Even though I have been skiing over 120 days a year, made millions of turns and thousands of different types of turns, I'm positive that there are still some new sensations out there waiting for me.
Edit: This is a great example to make sure that when we are teaching that we are clear about what part of the turn, skills, body parts, etc.
Try sliding the outside ski ahead to even up tips at end of turn.
See video of Felix Neureuther in Slalom: