Outbrain
Survey results that initially showed Twitter driving more traffic to news sites than Facebook were incorrect, the company behind the study says.

Outbrain issued revised results last week that show Facebook actually drives about seven times more visitors to news articles than Twitter.

The new results also show that links from other content sites account for 46 percent of referrals, followed by search at 40 percent and social networks at 14 percent. The initial results had the same order, but with a bigger margin between content sites and the others.

It's unclear what caused the errors in the initial results, but an Outbrain employee said the company ran the numbers again and found some mistakes.

The data was pulled for the second quarter of 2011 from publishers that work with Outbrain to provide recommended links to their readers, including The New York Times Media Group, The Atlantic, msnbc.com, The New York Post, AllThingsD and Mashable.