Granted I know Klein mainly from hearing her in interviews and documentaries, but mostly from her followers (I went to college with many of them). However, that review of her seemed pretty right on with the problems that I've had with her (though more with the faction of political thinking that holds her up). The shrill-ness and blame corporations (and now neocons) for everything attitude, I think, blocks clear or useful thinking. Its a defensive stance that doesn't allow for either comprimise or priorities. Everything is part of a right wing cabal of people who apparently think exactly the same thing. Often, it doesn't matter what it is, but its definitely evil.
I agree with so many of the basic ideas that followers of Klein (ultra-left? I honestly am less comfortable with many of the political labels than apparently Klein is) about over-consumption and the limits on the use of military force. But the rhetoric of conspiracy and black and white thinking has always left me cold. I might feel the same about TNR, but that doesn't mean their generally view of her failings aren't on the money.