Probably more than you think:
...and plenty of other kinds of NEW content on lots and lots of websites! Here are a few of the things I'm reading:
RSS use according to the Pew Research Center for the People & the Press (2008):
"Many web news consumers take advantage of a variety of online tools to tailor the news to their needs and time demands. (...) 12% say they have an RSS reader that includes news items."
Start here (http://youtu.be/0klgLsSxGsU) with this great intro to what RSS is and how it works. (3:46 minutes)
RSS (some people say it stands for Rich Site Summary, some people say it stands for Really Simple Syndication) is a format for publishing web content. It's used to "push" timely information and updates to people who subscribe to RSS "feeds". What's so cool about it is you can collect a bunch of feeds in one place (your reader or news aggregator), log in whenever you like, and see what's new. You don't have to visit all the web sites one at a time, and you don't have to waste your time with old news.
Keep up with more information in less time - try it!
If you want to know more, including some of the technical details, try Wikipedia.