A third of every supporting iOS device is already using iOS 5, Localytics said Monday. Although less than a week old, adoption is up to 33, 35, and 36 percent for the original iPad, iPhone 4, and iPad 2 respectively. iPhone 3GS users have been relatively quick to upgrade despite the hardware's age at 27 percent; iPod touch owners were the most reluctant at 23 percent and 17 percent each.
