jimbeetle - 8:59 pm on Jul 29, 2013 (gmt 0)
Well, today John Mueller weighed in with a much more direct answer to the press release question.
He first said that Google thought of press releases as advertisements, so the links should be nofollowed. He then went a bit further, stating that Google viewed press release links as "unnatural."
John Mueller Webmaster hangout [youtube.com]
Browser is creating havoc with youtube so finding it difficult to note specific video times. John's comments are within first 10 minutes.