I can't speak for other countries, but the idea of using the center of the lane as one's "primary riding position" comes from the UK book Cyclecraft by John Franklin, though a N. American edition is now available that covers Canada as well as the U.S. I know folks all over the U.S., via mailing lists, forums, blogs, facebook, etc., who have adopted this style of riding and have nothing but good things to say about it in terms of comfort, safety, better treatment, etc. It's not intuitive to be so assertive, but it works great. There's no going back to "edge of road riding" one you get the knack. Key, I think, is that you're so much more conspicuous and obvious.
As to where the rear view is - it's two guys, one in front of the other, each with a helmet cam. The guy in front is filming backwards; the guy in back is filming forwards. That way you see a cyclist in every shot. Check out some of the other videos they have their youtube CyclistLorax channel, at least their first/main one (rights and duties of cyclists). Good stuff.
The lack of head turning bugs me every time I watch it, but they're anal about getting the video right (if you turn your head you move the camera), and they're expert mirror users.
That was in CA. Here's another take on the method, from Orlando, FL:
Video:
http://vimeo.com/17300276
Article:
http://commuteorlando.com/wordpress/2010/11/29/helping-motorists-with-lane-positioning/
These folks in FL are cyclingsavvy.com, and they teach even novices to ride like this.