I'll make a few comments and then probably leave because I don't want to disrupt the thread too much.
In any but a never ever lesson when the word turn is used is brings a fairly narrow scope of meaning to the student. For most of them it means braking and is associated with the movement pattern to produce a braking action. The outcome here is a pivoty/pushy 'turn' that produces little control of line and exhausts the skier. The thought/idea of 'turn' will trigger this movement pattern as a learned response just as the word 'sit' will trigger a learned response in my dog. My goal is to change that movement pattern. which is made more difficult if the trigger word is still used. This is why I avoid the word rather than take BB's approach of redefining the word to refer to controlling line and then continue to use it in that context. Unfortunately, the way people work, the old definition will have a reflexive response in mind and body tending to produce the old movement pattern while the new definition is an intellectual abstract not tied to any movement pattern. Bob's intention is to separate braking (movements to control speed) from turning (movements to control line), I want to do the same thing but my educational background indicates that using the old word will be counter productive so I opt to avoid it.
Does it work? For me and my students,yes. How do I know it works? Feedback from my students both verbal and visual (I can see the changes). Would it work for others? I don't know, I am someone with an extremely high aptitude/talent for teaching who has supplemented that with a life of studying education and pedagogy and how all that applies to teaching skiing and I know I can make things work extremely well that others struggle with.
Another issue is that most skiers don't think of 'turns' as being a connected series of smooth arcs that blend together. In their minds a turn is a stand alone, fairly quick, change of direction to connect straight line motion just as a 'turn' when driving does. I can say they think this way, by and large, because I have talked to thousands of them on this subject and the responses have been fairly consistent. Changing the mindset from 'making a turn' to 'going there along a curved path' is one part of changing the students movement patterns.
There is a teaching technique that is called a 'guided experience' the intent of which is to produce an unexpected outcome and open the students mind to new ideas. Challenging the use of a common term is a verbal form of this and has been, for me, an extremely effective teaching tool.
In skiing you can do three things, go left, go right or go straight. I can combine these to go where I want to, that elusive 'there' that Rick wants to make fun of but underlies all good skiing. Racers have their 'there' rigidly defined by the gates and they better 'go there' every time. Big mountain skiers 'there' may be determined by wanting to set up a huck or control speed of descent or not die. As a recreational skier my 'there' might be determined by my intent, am I hurrying to get to line up after ending a lesson on a distant part of the resort, am i heading for the bottom after a full day in the bumps or am I freesking just to have fun. Sure 'there' is somewhat vague but intentionally so where 'turn' is vague and confusing for most of the skiing public unintentionally and so can produce problems. Again, I am basing this on thousands of discussions with students and instructors.
Enough for now, if things stay civil, I'll be happy to continue the discussion, otherwise I won't bother.
mod note: editing "breaking"->braking