There's an article in Bowhunting magazine that talks about this as being 1 of the things in hunting that people rely on way too much and he talks about that if you are in a tree stand your scent is carried above the deer most of the time. If I remember I'll scan the article and post it here tonight.
This doesn't surprise me.
All I have to do to prove this in my mind is......think about ALL the times I've had deer come from a TOTALLY (say...180deg.) different direction than where I thought they were going to come. What good does it do to set up "playing the wind"....when the deer don't cooperate?
I'll play it to an extent......but I won't get down and move if it shifts. I'll take my chances being 20' up and as clean as I can be.
Kudos to you guys who REALLY do this (move).