Check the date on that article - June 2007. Many things have changed in the world of SEO in 3 years (heck in 3 months).
I would not base a campaign on the information listed in that article. Relevant links DO play a role in SEO, and even more important, relevant "do follow" links play an even bigger role.
When looking for how to do something, please be sure to check dates on the articles. Things from last year and 2 years ago can be very different. It's one of the things I don't like about search engines showing results from 1998 sometimes. There's still articles out there that say there's nothing better than HTML Tables for quick page loading times. Others that say use a DIV tag, and then others (more recent) that say use CSS. The date of an article should play a big role in your research.