Teenage girl language innovation for centuries?

Girls have always been criticised for the language they use however, it has been argued that its teenage girls who introduce a lot more words to the English language than any other group. In 2003, Terrttu Nevalainen and Helena Raumolin-Brunberg (from University of Helsinki linguists) wrote a book called 'Historical Sociolinguistics.' In this book they had surveyed 6,000 letters from 1417 to 1681. They discovered female letter-writers changed the way they wrote, adopted new words and discarded older words such as 'doth' and 'maketh' faster than male letter-writers. 





http://www.smithsonianmag.com/smart-news/teenage-girls-have-been-revolutionizing-language-16th-century-180956216/?no-ist