I’m pleased to publish the tutorial on correlation coefficients. So, start ignoring the quack science from the usual SEO losers. Statistics is a loss for them, anyway.
Instead of speculating about the scientific work of others or misquoting their work, we did what any serious researcher would do: We contacted them directly.
Enjoy it!
IR Thoughts 
OOPs!
I forget to include the link of reference 19 in the tutorial, so I’m re-uploading.
Enjoy it!
PS. By now you might understand why SEOMOZ “rebuttal” is more of the same crap they are prone to publish. I stand by the fact they are doing quack “science” and I’m still demanding a retraction.
A full response to SEOmoz “rebuttal” and alleged “knowledge” on statistics is available now at https://irthoughts.wordpress.com/2010/07/12/on-seomoz-knowledge-about-statistics/.
In addition, a tutorial on the correct way of computing and analyzing correlation coefficients is available at http://www.miislita.com/information-retrieval-tutorial/a-tutorial-on-correlation-coefficients.pdf
I hope this helps.