A third of US teenagers with cell phones send more than 100 texts a day. The study by the Pew Research Center found that texting eclipses cell phone calls, instant messaging, social networks -- and talking face-to-face. Girls typically send or receive 80 text messages per day and boys, 30 per day. Nnow teens expect other teens to respond to text messaging and to be available. While boys don't typically use punctuation, for girls such nuances are critical.
Read more from Reuters.