Some of you may have experienced App Store on your iPhone/iPod/iPad being very slow. The reason for this is Genius for Apps system service. After its turned off, you’ll see a noticeable improvement in App Store.
To turn off Genius for Apps follow these steps:
1) Open Settings
2) Go to Privacy
3) Go to Location Services
4) Scroll to the very bottom of the page and go to System Services
5) Set the status of Genius for Apps to Off.
This only works in iOS 6.