Wordpress is used by 1/3 of all websites in the world.
Our thing is like Wordpress not Twitter.
So while it doesn’t currently support the latest protocol du jour (XMPP? FriendFeed? FOAF? ActivityPub? PubSubHubbub? Scuttlebutt?) it actually WORKS and people can use it to actually build apps today that are on par with what they get in Facebook.
Like I said if all we wanted was to have a microblog we would be done very soon. As it is that is 1% of the functionality you need for realtime collaboration, offline notifications etc.