Marketing_Guy - 11:10 am on Feb 28, 2012 (gmt 0)
Potentially the age of a link as a factor could be depreciated. I would guess that as a factor, it means less as time goes by as the amount of broken links or "editorial supervision" of old links would dirty the data set. When was the last time you went through old blog posts to check the links are all still relevant?
Given that social media properties and link building activities have escalated in recent years, links have become less about a vote for a site and more of a passing, frivolous activity in many ways.
That said, if it was in any way a significant factor, turning it off would probably have a notable impact on existing rankings for a lot of sites and seeing we haven't noticed that, it's either unlikely or not that important a factor.