The Face of Retail 2.0 - Twitterlogger Brands
Twitter has become more popular than LinkedIn among social network users in the United States.
Aside from posting tweets, Twitter users tend to blog frequently. In fact, more than 20% have their own blog, many of which trumpet social causes. These consumers make good evangelists for brands.
The Anderson Analytics study tracked U.S. user behavior for 11 months. In May, the firm surveyed 5,000 users, and then conducted a 15-minute survey of more than 1,000 users and 250 non-users, age 13 and older. Users were defined as signing on to a social network within the past 30 days.

source::
http://www.mediapost.com/publications/?fa=Articles.showArticle&art_aid=110517