I think the biggest part of this change in facebook usage is that we all just grew out of this college network and started adding co-workers and all sorts of other mature audience. This then causes you to tread facebook as a different kind of communication tool. I guess you can say the experience on facebook just matured all together and people are using it differently. Everyone is more cautious about the way they come across on the social graph and what they make public.

After all thanks to Zynga we now all got our mothers, relatives and what not as facebook friends. And like the article says, who has time to setup lists?!