I have been on Twitter for a few weeks and find it quite intriguing - for much of the time. I like the information that is sent through much of the time.
But two things get me:
1) those people who are regarded as "icons", such as Stephen Fry, who are allowed to judge things in a few words and are hung on to. Even to the extent that he is being used to recommend world music albums by p.r.'s. (Well, I like Stephen Fry a lot, and like much of what he says, but not that religiously.)
2) People come to snap judgements and write up instant reactions at the wrong times. Perhaps they should sometimes take some time to digest things or listen again. I was reading, on the BBC web site how the instant comments to Bruno were enough to kill box office by Day 2 and also the latest U2 album.Not a good thing for jazz, where the devil can be in the detail and the second, third or fourth listenings can be revelatory.