Yes. Kyle Simpson rocks. He is smart and he looks deeply into things. He is opinionated and I like that too. I learn more when I see smart opinionated people disagree with each other.
The fact that these books need to be written to de-mystify JS is evidence that JS sucks. We should not need to know esoteric crap - NOR SHOULD WE BE SATISFIED with programming by rote as many above seem to be advocating. (!?)
Having said that, JS is improving and the future looks bright.
(Disclaimer: this coming from someone self-employed who has never worked on a team.)
As this metaclass / function VS Function / whatever dispatch business is much worse than recently discussed message-passing purism, in its worst forms.