Looking at their Analytics screenshot for that traffic, I see that "new visits" was just 5.42%, compared to a site average of 43.58%.
Given how unspecific the search term is, I can only assume that's because 94.58% of that traffic wasn't actually organic traffic, but was SEOmoz staff + people they talked to clicking on it.
Given how unspecific the search term is, I can only assume that's because 94.58% of that traffic wasn't actually organic traffic, but was SEOmoz staff + people they talked to clicking on it.