BTS, I forgot about your back issues, but I'm glad to hear you will be back in the saddle next year. I do use the walking analogy "sometimes".
I think the important ideas to take away from this discussion and Bob's quote for that matter, is that we want to encourage and lead our students to the understanding that movements that originate in the foot, and move in the direction we want to go are going to be more effective than movements that take us away from the direction we want to go or start higher up in the body. Generally speaking.
For those who think entry level examples are irrelevant,,,,we need to be teaching movements that have a common thread that will continue to be used and refined up to through expert level skiing.