Hello, I wrote a newsletter on the engimatic subject of page rank. Here it is http://www.yourecommerce.com/nl2.htm I wrote it according to my own research and what others have told me. Of course I don't know for sure if it's all correct, but it's what I feel on the subject.
I have quit worrying about my PR ranking and am only concerned with getting targeted traffic to my site. I am focusing on SEO (which as a side effect will increase my PR) to move up in the SERPS for my targeted keywords, and on getting links on sites that can send targeted traffic to my site.
So I definitely agree with your article. Pay attention to getting traffic and the PR will increase as well.