Unsurprisingly, reports of teen sexting have been exaggerated:
http://www.cbc.ca/news/health/story/2011/12/05/sexting-youth.html
http://well.blogs.nytimes.com/2011/12/05/sexting-among-teenagers-not-as-common-as-thought/
http://gothamist.com/2011/12/05/study_teenagers_dont_sext_so_much_a.php