yeah I think that's a good point.
When I think of splitboarding in this area tho I still think most all the riding is above tree line.
The week I was here Chris Coulter did a 2 day trip out a place called Refugio Frey with several of the guys a part of SGT. These guys have been riding the Andes around Bariloche for 7 years now. http://www.ccoultershred.com
If there's anyone to ask about backcountry riding in the Argentina Andes its these guys. I'll have to ask him about the tree runs off the mountain.