This is such an emotional roller coaster for me.
It's hard to hate a man who teaches a girl with cerebral palsy to walk her dogs. His sessions cover so much different stuff, and some of what he does is perfectly fine. Some of it really isn't though.
Here is my take on Cesar having simpler methods, because he uses the "shhhht" sound in so many scenarios. To me, this is a command that says, "drop what you're doing and pay attention to me", or maybe "take it down a notch." I would consider it similar to my "ah-ah-ah" sound for Thor, which means, "reconsider what you are doing." This command can be taught like any other. I think in this case, Cesar is "whispering", in that he is using a challenging, dominant stance that most dogs will respond to with a pacifying signal: sitting, lying down, looking away. Sometimes I think they are just startled. Karen Pryor talks about teaching paired commands, like Speak/Quiet. You get the dog going with Speak! Speak! Speak! and then suddenly you give a completely different signal, Quiet! The dog will probably look at you and think huh? I don't know that signal. What do I do? And they are usually Quiet while they think that. That's also often the start of learning Stay.
I know others here might consider this a "no reward marker" and be against it, but personally, I think it's effective.