It doesn’t really surprise me that twitter is only used by a small number of people - most of my friends not in the digital industry simply do not get twitter. If I dare mention it in the pub, it had better be about a footballer or eyes will roll. Its seen as a ‘look at me’ medium. And to be honest I tend to agree. How many conversations have you actually had on twitter? I have made passing comments, read a lot, shared a lot, but actually having a conversation? The most interesting points are usually made by celebs or agency’s who are really unlikely to reply to you; they get hundreds of responses. For me twitter is a great news distribution tool. Its great for identifying buzz, fining out hot topics, and finding out what Stephen Fry is having for breakfast. Other than that, it doesn’t have the reach that Facebook does outside of a very niche group of people - namely tech savvy industry/media types and teens.