I'm stealing this from Dash, but it's worth pointing to - an excerpt from a book Twilight of the Gods:  This is one of the coolest and funniest takedowns of Ken Wilber I've seen, sly without being mean, recognizing Ken's work, without devaluing, yet freshly descriptive:

JE: In your book Coming Into Being you compare the work of Jean Gebser with Ken Wilber. Can you discuss the differences that you see in the approaches of both of these men to the evolution of consciousness?

WIT: Oh, it's almost classic cultured European versus Midwestern American hick. You know, I think people like Terence McKenna and Ken just grew up in Eastern Colorado and Nebraska in such culturally deprived areas that they get captured by a kind of abstract construction of what they imagine the big European thinker is, or the psychedelic hero in the case of McKenna. And Wilber, as I say in Coming Into Being, is just very abstract but Gebser is an artist. He has an incredible insight, for example, into the role of adjectives in Rilke, and what it means when you use language in a particular way to create an imaginative landscape that's more processive and less prospective of composed object nailed down into perspectival space. So there's an amazing senstivity to art and poetry and painting and the richness of European culture. But when I was teaching temporarily at the California Institute of Integral Studies, all the students didn't like Gebser because they can't remember a painting of Cezanne; they don't read Rilke. They're just into drugs and taking Extasy and going to Raves, and looking for some kind of psychotherapy technique. And so Wilber is their hero because he just gives them all these maps and charts, this Michelin guide. He's a control freak. There's no sense of humor, there's no sense of art, it's all just sterile and masculine in a very dry and abstract way.

I didn't want to be an egomaniac and say, well, my culture history is better than Wilber's. I didn't want to go into that. So I went out of my way to use Ken Wilber's Up From Eden as a textsbook, and had everybody read it in my Lindisfarne symposium at the cathedral. But when I did that, and went out of my way to give equal time and to really be open to Wilber, and read the book, and underlined it, I just thought, God, the difference between this and The Time Falling Bodies Take to Light--they cover exactly the same turf--is the difference between a textbook and a work of art!

Now, I think there is a lot of value in the Midwestern American hick philosopher - starting with William James, and onwards!  But it sure is interesting to get a different take on it - European arrogance rather than american!