An interesting look by bitly at the lifespan of their links:

> The mean half life of a link on twitter is 2.8 hours, on facebook it’s 3.2 hours and via ‘direct’ sources (like email or IM clients) it’s 3.4 hours. So you can expect, on average, an extra 24 minutes of attention if you post on facebook than if you post on twitter.

([Via Rands.](

The Half Life of a bitly Link is About 3 Hours