From the NYT:

According to interviews and recent surveys, younger voters tend to be not just consumers of news and current events but conduits as well — sending out e-mailed links and videos to friends and their social networks. And in turn, they rely on friends and online connections for news to come to them. In essence, they are replacing the professional filter — reading The Washington Post, clicking on CNN.com — with a social one.

“There are lots of times where I’ll read an interesting story online and send the U.R.L. to 10 friends,” said Lauren Wolfe, 25, the president of College Democrats of America. “I’d rather read an e-mail from a friend with an attached story than search through a newspaper to find the story.”

In one sense, this social filter is simply a technological version of the oldest tool in politics: word of mouth. Jane Buckingham, the founder of the Intelligence Group, a market research company, said the “social media generation” was comfortable being in constant communication with others, so recommendations from friends or text messages from a campaign — information that is shared, but not sought — were perceived as natural.

Ms. Buckingham recalled conducting a focus group where one of her subjects, a college student, said, “If the news is that important, it will find me.”

A December survey by the Pew Research Center for the People and the Press looked broadly at how media were being consumed this campaign. In the most striking finding, half of respondents over the age of 50 and 39 percent of 30- to 49-year-olds reported watching local television news regularly for campaign news, while only 25 percent of people under 30 said they did.

Fully two-thirds of Web users under 30 say they use social networking sites, while fewer than 20 percent of older users do. MySpace and Facebook create a sense of connection to the candidates. Between the two sites, Mr. Obama has about one million “friends,” Senator Hillary Rodham Clinton, his rival for the Democratic nomination, has roughly 330,000, and Senator John McCain, the presumed Republican nominee, has more than 140,000. Four out of 10 young people have watched candidate speeches, interviews, commercials or debates online, according to Pew, substantially more than people 30 and older.

Young people also identify online discussions with friends and videos as important sources of election information. The habits suggest that younger readers find themselves going straight to the source, bypassing the context and analysis that seasoned journalists provide.