BW:
First of all, congratulations. That's sounds like a classification that usually goes to "skiers with more experience". Are you on the fast track to becoming a demo team member?
Second of all, thanks for being willing to share your knowledge in spite of the shark infested waters. It is my sincere intent that no blood be spilled, that anyone should be able to say "this is how I would approach the problem" just as Max also did.
I will admit I was hesitant to ask the question because of where it might lead, I'm glad everyone responded with restraint.
As far as a drill that "teaches active separation" I don't know, but I would imagine that all of the PMTS instructors have drills or exercises that lead their students in the desired direction (I hesitate a bit, because I'm not sure that "active separation" is their goal, but CA/CB is. And I think the real point of Lynn's other post is that doing drills isn't the same as doing drills correctly and with the focus that generates the most return. Your response is much the same, and I imagine that you would select drills appropriate to the student.
What Lynn was working on, if I remember correctly, was exaggerated counter acting along with earlier tipping and edge engagement (and slower transition, so Gary was correct there). Whether she was doing it correctly only a coaches eye would say. I would say that, after she dropped over that knoll and gained some speed, the hips and upper body became much quieter along with the shorter turns.
But the reason she posted the video was to get honest feedback, and I think BushWacka's observations were very helpful and accurate.
Jim