When I heard FB was down I went over to twitter to see how many tweets this was generating, I was surprised to see the first refresh of "XXXX more tweets since you started searching."
I decided to start keeping track and I made a graph of the difference between refreshes. You can see my graph here. It seems like in the course of just a few minutes (I was probably conducting my little experiment for 10 min?) you can see the frenzy gaining momentum then it seems to die down until only hundreds of people are talking about it per 15 second refresh.
A little bit about the graph, each tick mark on the bottom represents a refresh (15 seconds or so I think). The Y axis is the difference between refreshes.
Graph: http://drp.ly/e3oH