wheel - 1:46 pm on Feb 4, 2011 (gmt 0)
What sort of backlinks would content farms have that others don't? I can't imagine anything.
I think they've somehow weakened authority links over the years by allowing large volumes of low quality links to get you ranked over lower quantities of high quality links. But I can't imagine that's what they're talking about (I'd love it if they did though).