Internet people get fired up by really weird things.

Social aggregation (Digg, Twitter, Facebook oh my!) is a slightly higher rent version of technical aggregation.

Human beings are way better than computers at finding context, but are much, much worse than computers at sorting through giant, complex piles of complicated data. Honestly we have better things to do, like watch The Jersey Shore and cure Cancer.

The result is that social aggregation gives you more meaningful information from a much smaller group of sources.

You trade a little extra relevancy for a lot less diversity.