Totally agree with this post.
I just don't understand why instructors over there are making you abandon upper body steering.
It seems a lot of instructors are lazy or something. Turns should be initiated by your core (hips) and your shoulders. Teaching students to scrub off speed and steer with their feet will get them down the hill faster the first time, but as they progress, they'll have to relearn everything or be f-ed. All your balance and body control comes from your core, so if you ignore that as your speed increases, you'll be headed for Smashyville.