Cesar Millan has my greatest respect and support. He treats dogs like dogs, not like small children. If you know about dogs, they discipline each other all the time. He is brilliant.
Yeah, I had a friend once that bred dogs. The mother of the litter would always kick her puppies, and give them good jerks around the neck that can damage their spine.
Humans aren't dogs, and dogs don't see our 'discipline' as natural. Most dogs in groups also have arguments all the time with a lot of snarling and snapping, yet most humans think it's unacceptable for a dog to do that to them.
Considering there's more humane methods, that work quicker and better, and actually have scientific research backing it up, I don't see why anybody would use a method like Cesars. Also he relies heavily on the dominance theory, which is a myth that has long been debunked.