I don't think anyone mentioned this and if they did and I missed it I apologize in advance. I saw the little chart that was posted a couple pages back about Aang touching 2 points on the body and Amon not but although they aren't the same two that doesn't seem to be the case. I was rewatching episode 2 and every time he preformed the act not only did he do the forehead touch he also seems to do some sort of touch/pinch on the victims shoulder/neck. It could just be part of a takedown but he does seem to keep it held during the whole deal. I suppose you could use this to either support or argue against him energy bending but typically when I think about about neck pinching I think pressure points which I think seems more in line with Chi blocking. It could be nothing but if you look at each wide shot of him doing it he does it to each bender.