I am happy to see that there are people who see the importance of PR. I just wrote a hub about improving page rank and was told by some readers that page rank is no longer important.
Google favors HP and our links are crawled and indexed much faster than most other sites. The crawlers start picking up your content even before they are published so in less two to three days after hitting the publish button, your hub can bee seen on the net. If you have been working on the hub for a few days, it has already been crawled so will show up much faster after publishing. That is why I like to let my hub sit a few days before publishing.
The more a site moves up the ranks the more traffic Google sends it's way and that is what Google says.