A 2007 PEW Internet & American Life Project survey found that:

• 64% of online teenagers ages 12 to 17 engage in at least one type of content creation



• 35% of all teen girls blog, compared with 20% of online boys



• 54% of wired girls post photos online compared with 40% of online boys



• Nearly half (47%) of online teens have posted photos where others can see them, and 89% of those teens who post photos say that people comment on the images at least "some of the time."



• However, many teen content creators limit access to content that they share

Reference:

Lenhart, A., Madden, M., Smith A., Macgill, A. (2007). “Teens and Social Media”, A Pew Internet & American Life Project Report, Retrieved July 4, 2010 from http://www.pewinternet.org/Reports/2007/Teens-and-Social-Media.aspx