I agree with Peaches point about immersion. Also, Bastet, I think you're on to something. And it reminded me of what my teacher said to me a few weeks ago. I had just made some big leaps in understanding the walk, and I told her I finally "got" something she'd told me on day one. She just smiled and told me not to worry, the walk was something you work and develop forever, until you have your own style. At that point, after years of study it's all about subtleties. Dancers at that level no longer judge by how their moves look, but by the signature of their walk. I also think part of the mystery has to do with how new AT is to most of our areas. I mean, how many people in your town have been dancing AT for 20+ years? It's not that there CAN'T be a non-Argentine milonguero, it's just there hasn't been time enough for many to reach that level.