buckworks - 7:21 pm on Jul 25, 2010 (gmt 0)
Even if we knew the exact answer to the questions, how would that help us? I don't see any actionable information here.
There's nothing we can do about the age of links on other people's sites. We've either got 'em or we don't, so why fret about it?
Keep your focus on gaining new links, and let the nuances of aging look after themselves.