Inbound marketing software company HubSpot (that grew out of MIT research) last week-end posted an interesting presentation about inbound marketing but most of all about the role of Twitter and the changes in the Twittersphere.
The presentation shows that traffic is slowing on Twitter as well as user growth (posted about that before).
But, according to HubSpot Twitter is now a more mature service with on average more followers, more following and more updates.