A quick look at the site you mention gleans these words:<p><i>"SEOmoz surveys top SEO experts ...opinions of the algorithmic elements that comprise search engine rankings"</i><p><i>"Each participant was asked to rate more than 100 search ranking factors"</i><p>So it's not reliable, it's a survey.<p>It's not backed by evidence but by opinion.<p>And how can an SEO be called 'referenced'. I didn't realise SEO was a science.<p>The only true thing in your statement is up-to-date.<p>A better description would be that it's based on guess work by the men who are most known for snake oil and me-too mentality in the IT industry, SEO 'experts'.<p>Just playing devil's advocate but I don't really think that article is any more likely to be right than this guy's.