I just got back from the FIS portion of the Lutsen Spring Series. I agree, in slalom all the elements Harald talked about when I skied with him this year are present in the top skiers (Martin Krosenleiter, Tom Rothrock, the Aussie, Wall, Francesco Ghedina and several Swedes from the national team) all demonstrated the flexing of the downhill leg, bringing it over to the new "stance foot" and tipping. When I asked Harald about the "pivoting" I was seeing in WC slalom he asked, "is it result or intent?" After lots of video review, and trying it myself, I'd say it's result. (I'm even more convinced after seeing it up close while dodgeing those guys as I was doing course work)
Harald didn't dream this stuff up, he observed it and is trying to find a way to teach it. (like all coaches) Scott Wilson, a mentor of mine and aquaintence of Harald's, told me that, 25 years ago. "We don't figure out technique". "We identify it and figure out a way to teach it".
As for the "rotary" thing, Harald defines it as "twisting the ski with your foot", not the way it's defined in PSIA. He recognizes that there is "internal rotary" involved in tipping moves.
I did my PSIA ed credit two weeks ago. We worked on White Pass turns with extension and wider stance with 50/50 weight distribution (and everthing on either side). It certainly didn't feel as good as the turns I was working on after I skied with Harald but those are "Stepping Stones" just like Haralds moves are. (Stepping Stones can be anything to get you to a goal) I noticed that all of the PSIA guys had an "up" move in transition while none of the WC skiers did. (intentionally anyway)