A million years ago when I raced the 'hands out front' wasn't so much a trick to manipulate our hip or shoulder positioning as it was to keep us forward and athletic so that if/when our balance faltered our hands would instinctively pull in to counteract it and by punching them back forward we could easily reattain the forward athletic stance.
Fwiw I don't know what ski racer development is teaching these days but some of my friends' kids have gotten some freeride coaching and they seem to be pretty firmly on the "shoulders stay pointed down the fall line" (ie mild counter) school of thought. Though that probably has to do with force generation and efficiency being less important than optimal balance through more variable terrain ¯\_(ツ)_/¯
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