This is a great development that will hopefully “weed out” all the really crappy no-effort sites that have been hogging many top positions.
It will be interesting to see how this develops. I think the real expert link spammers may have the money and resources to develop a solution to this, but maybe not. It may also be a concern if the search engines take this one step further and work hard on detecting any form of link credit that seems artificial. The truth is, all of us here who rank well engage in activities that “artificially” build link credit. So, where will the line be drawn?
It’s sad that a small group of people have link spammed so badly with no content crap sites that they have drawn too much attention to the whole idea of links being worth something.
From now one I hope it will be a more level playing field where the person with the “best blog spam tools” doesnt always win…