I don't know much about shooting form (I don't even have a coach...), so I can be false, but I think you mix two things:
1. This:
Dutchtarget.com - 2007 WORLDCUP ANTALYA, TURKEY/IMG 1907 Dutchtarget.com - 2007 WORLDCUP ANTALYA, TURKEY/IMG 1917
These pictures look very good, and many recurve archery anchor like them.
2. And what the bent arm girls do on the pictures above, especially the second one.
As I can see, her anchor point is floating, she should pull both the string and her hand closer to her face, to gain a more consistent anchor. Just touching the face/neck with the thumb is very hard to repeat every time the same way. As I experienced, I can do anchoring more consistant if I pull the the string and my hand into my face. I try to use points on my hand as close to the string as possible. (Point and upper edge of index finger, upper part of hand)
(((bit OFF: There are methods, when you get on better with a higher side anchor, especially at close distances. I mean the unsighted divisions in field, 3D and historical archery. You aim with the point of the arrow, so it's better to have the pile near the target. I think it's harder to find a good anchor that high, but there are good examples, when archers shoot amazing scores with these methods.
http://www.fieldarcher.org/gallery/a..._Kakas_001.jpg
So, barebow archers truly try to use higher side anchors, but not floating anchors. Mine looks like this:
Picasa Webalbumok - Zoltán - Íjam)))