How exactly? In the time it takes you to register an account on twitter.com you could as well register an account on wordpress.com and publish via RSS. The main difference is that longer content is possible, that you could find even easier/faster/whatever alternatives because its federated and that your communications are not dependent on the policies of a single private company - which for non-us-citizens like me is operating under foreign law, a law I don't know as well as the local one.
I don't watch much TV, but what little prime time TV I've seen recently, seems to pimp their twitter acct and semi-relevant hashtags constantly both intro and exit to the program and even believe it or not, during the program they pop hashtags on the screen. Only about 1/30th the population watches survivor so this is probably news to most HN readers.
One of the biggest things is that there is one, singular Twitter app. There are a million RSS readers, but it's difficult to know which one to get. And, of course, it's a reader, not a publisher - you need a separate app for that.
