According to a recent survey by Anderson Analytics, “52% of social network users had become a fan or follower of a company or brand”. So a majority of people using sites like Facebook and Myspace are proud enough of their relationship with a company to announce it to the world and thereby endorse the brand to their friends and co-workers.
In addition, “46% had said something good about a brand or company on a social networking Website—double the percentage who had said something negative (23%).”
(Via eMarketer.com)