Just as I was asking about the similarities between Twitter and RSS, Tech Crunch writes an article about the very same question (only a week after I made my post!) 
Said TechCrunch:
Twitter, Facebook, FriendFeed – whatever they grew from, they morphed into a realtime CMS for the emerging media. Twitter, not RSS, became the early warning system for new content. Facebook, not RSS, became the social Rolodex for events, casual introductions to RSS’ lifeblood, the people behind the feeds. FriendFeed, not RSS, captured the commentsphere. RSS got locked out of its own party. Today, RSS is a shell of its former self, casually subsumed as the transport for 140+ content into the social stream.
I agree with TechCrunch – RSS is not as useful as it once was and nowhere near as instantaneous as my daily Twitter feed. If only they would have credited me for their thoughtful blog post. 
