You can also grab the data yourself and noodle around.
A few of us started discussing it on Twitter, so I thought I'd post it here to give us more space to share thoughts.
I'll go first: the fact they got X number of @replies indicates interest to me, but not engagement, which I think means two-way involvement. I'm still trying to get a handle on the stats that tell me a story about engagement: what works, what doesn't, where should we invest meager resources, etc.
One lesson that I do see is that online events like the town hall do raise interest and responses, but without sustained two-way conversation, those go back to pre-event levels pretty quickly. That seems intuitive, but here's a stats set that demonstrates it.
What stories do you see in this graphic? What questions does it raise?
Share your thoughts in the comments.