I know that my own usage would back up the claims in this article:
‘Facebook fatigue’ kicks in as people tire of social networks | The Register
But it’s not social networks that are wearing me down…it’s the closed nature of Facebook (and SecondLife for that matter) that keep me from being connected as often as a I should. It’s easy to connect Twitter to my web footprint. It’s easy to let a stream of tweets flow by in the left hand of my screen in Twhirl. It’s just to hard to go to the facebook page and continually hit refresh to see what’s new. Maybe I’m being too lazy?