wheel - 3:48 pm on Aug 8, 2011 (gmt 0)
I don't believe this is always the case, and believe that depending on the authority of the source, those outbound nofollow links might actually increase your hub score, or weight of the link to you, from an article or blog post.
Based on one data point, I have to disagree.
I have a website that has 54,000 backlinks showing in Yahoo. They are all run of site links. They are all on high authority, relevant sites. And they are all nofollow.
And the site doesn't rank worth a dang on anything. It'll show up for very specific long tail terms, but I'd say that's just as the result of having the content on the page.