iOS 5 has been out for less than a week, but the mobile operating system has rapidly gained a foothold among iOS-based device owners.
According to mobile app analytics company Localytics, which examined iOS device usage between Wednesday and yesterday, 33 percent of all iOS-based devices, including the iPhone, iPad, and iPod Touch, are running iOS 5. If the new iPhone 4S is taken out of the equation, 31 percent of Apple's mobile products are running its latest mobile operating system version.
