EXACTLY! Page rank is virtually irrelevant when it comes down to reeling in traffic. Helping to prove the point is the fact that I too have a site that has a page rank of 3, and it received 32,657 unique visitors last month and 52,3715 page views. This month, I expect it to achieve approximately 40,000 unique visitors, matching another site I have that only ranks in at 2.

Emphasis on both of these sites is on SEO copy writing and other attractions such as photos and videos. Neither site uses any form of advertising. The PR3 site has been around for approximately 10 years with a wealth of highly applicable inbound links, whereas the PR2 is approximately a year old with a decent amount of inbound links.

I too would like to hear your reasoning behind the magic number. Frankly, I must agree with the notion that the post may be a keyword-baited post.