Teens are not ruining our language!

In a forthcoming book (Teen Talk: The Language of Adolescents, forthcoming from Cambridge University Press, see http://www.cambridge.org/us/academic/subjects/languages-linguistics/sociolinguistics/teen-talk-language-adolescents), Sali Tagliamonte of the University of Toronto, examines teen talk. She is interviewed in this article from the Huffington Post:
http://www.huffingtonpost.com/entry/teen-talk-book_us_56fc44dde4b0daf53aeea341
Note, however, that her etymology of posh is likely incorrect, see
http://blog.oxforddictionaries.com/2012/02/what-is-the-origin-of-posh/
A similar folk etymology is the supposed origin of tip from “to insure proper service”.