Theoretically, we're just over a month away from iOS 7 being officially released, as well as some new Apple hardware being put onto the market. Of course, with every iOS update, there is a good amount of work required by developers to ensure support, and iOS 7 may have more than most because of all the new design elements...
Source: http://www.phonearena.com/news/Will-slow-iOS-updaters-face-app-compatibility-issues-52-of-devs-will-require-iOS-7_id46186
Source: http://www.phonearena.com/news/Will-slow-iOS-updaters-face-app-compatibility-issues-52-of-devs-will-require-iOS-7_id46186