The reality is, this demo is pedantic at best.
I look at coaching like this.
First you have a solid wedge turn doing proper leg steering mostly with some minor balance transfer and tipping move, and you coach open parallel on on easy slope. Is the student going to wedge christie on their way their? yep, but do we need to make instructors do a contrived exercises for exam or pay so much attention it? Really I think not.
The other one that drive me crazy about the wedge and wedge christie demos in exams is this idea. I coach open parallel on the easiest slope I can find. Quite often in exams they have candidate do these task on steeper than easiest terrain and it just doesnt make sense to me, and I feel it also show these PSIA people the wrong idea about these levels of skiing. I feel that the only success I ever have with teaching offensive matched moves to the majority of people is starting on the easiest or almost easiest terrain.
agree! A wedge turn with a rotary emphasis quickly becomes a christie. If we teach an edge release from the beginning the wedge morphs quickly to a parallel turn provided we remain on non threatening terrain!