In August, U.S. smartphone owners visited Instagram from their smartphones more frequently and for longer periods of time than they visited Twitter.Main reason for this is because on Instagram people take the time to look at a picture, whereby twitter you most of the time only read the message and scroll further.
Read the full article: http://allthingsd.com/20120927/instagram-beats-twitter-in-daily-mobile-users-for-the-first-time-data-says/
