What do you think about Ken Globus (bird whisperer) methods?

Parrots are a whole lot like young children, behaviorally speaking, except they never grow up. If you never disciplined a young child, they would be a run amok little terror. Also, like a small child, they need to feel safe and loved, but have a set authority figure in their life whom they respect. The same goes for your bird. They need to be taught the difference between right and wrong, and unlike a child, a parrot doesn't understand language, so explaining is out of the question. I have never felt any qualms about giving my amazon a little squirt or a firm "no" when he's misbehaving. He's smart enough to understand, and does indeed stop and switch activities to something more positive (then he then receives a treat or verbal praise). He's 15 years old, and perfectly happy and healthy, even though I have always used MILD discipline with him. I think it all comes down to common sense. Unfortunately, many people are so stupid, they wouldn't interpret discipline towards a bird as a squirt or a "no", but would rather scream at it or hit it, so experts have to recommend no discipline be used at all for birds safety and well being.