The Average Teenager Sends 3,339 Texts Per Month

Also interesting:

Texting is also supplanting voice calls — 22% say SMS is easier than a phone call and another 20% say it’s faster. Voice usage has decreased by 14% among teens and is decreasing in all age groups under 55. Eighteen- to 24-year-olds use the most minutes, but every age group between 18 and 55 talks on the phone more than the average teenager.