Tweets replacing Readers?

Seems to be a trend... A new blog that only provides updates via Twitter

Scoble abandons full text readers

Seth reminds all to get his blog via Twitter

Has RSS aggregators become too slow for today's standards? Has what seems to be such a simple feature of lists from Twitter started a whole new way for people to gather their news?

I'm using both - Readers and Lists - with my lists being managed through the Seesmic Web Tool and the more I use Lists the less I go back to my Reader. Something to watch...