[wiscoDude]

I put my thoughts on this article in a blog post. Too long for a comment.

"The Social Graph is Both"

http://lesspostmoreget.com/2011/11/09/it-is-a-graph-and-it-i...

[billswift]

Good essay, thanks.

>They are useful graphs with deficiencies.

This describes all graphs representing real-world, as opposed to purely mathematical, objects and relationships.