Most iOS users have not gotten the update notification yet. And many of those who have are waiting to apply the update since it requires a reboot. In addition,

Most iOS users have not gotten the update notification yet. And many of those who have are waiting to apply the update since it requires a reboot. In addition, the update is only available for iOS 7.0.5 except for the 3GS and its iPod Touch equivalent. There is still a substantial number of iOS users on iOS 6 – usually not by incident …