n00b1 - 1:04 pm on Sep 16, 2012 (gmt 0)
Do you happen to remember the date of the Hangout? That's just the kind of thing I was looking for.
On a somewhat related note, on "Webmaster Central office-hours, September 10, 2012" about 23 minutes JohnMu addresses a question about what exactly an inorganic link is. But his response to the second part of the question intrigues me as he basically seems to be saying that links on guest posts on related blogs in your industry are not considered entirely 'organic'. He may have been referring to anchor-specific links on websites that tend to accept pretty much any old content but I'm not sure. I always thought this was a good and valid sort of link to have.
Edit: I think my question is answered on 'Webmaster Central office-hours, September 7, 2012 (a)' at the 7-10 minute mark. JohnMu specicially says that sometimes manual actions are in place for a year or more so you generally wouldn't want to 'wait it out'. And pretty much dot on the 10 minute mark he is asked if they all expire and he says "as far as I know they all expire, yes."