The importance of Twitter is hugely overblown in the web/software geeks circles, and virtually no one outside has ever heard of it, and probably will never care.
Facebook encompasses Twitter's functionality too, but no one really uses the status updates like they do with Twitter.
The problem is Facebook's status updates are not accessible, for either reading or writing, outside of Facebook (at least it used to be true, I deleted my Facebook account a while back). This changes the way people use it.
Facebook encompasses Twitter's functionality too, but no one really uses the status updates like they do with Twitter.