I agree with Katy-Anne that his attitude in his articles tends to be pretty annoying. Really, the only ones I've read are the Ruckman ones, something about women and pants, and the article about Myspace (which I really think is ridiculous... Myspace isn't evil, but just like any other social network, you can get in trouble on there if you're looking for trouble).
I heard from another friend that met David Cloud in real life that he's actually a pretty nice guy. So, I'll give him the benefit of the doubt on that.
I just don't pay much attention to his articles because of his attitude.
