Hi,
I updated to iOS 6.6.0 SDK and started testing it for leaks.
I am testing on an iPhone 5 with iOS 7.0.3, launching my app and only waiting, not using any functionality of my app. It uses AdMob mediation using AdMob and iAds.
The app is non-ARC and it supports iOS 5.0 and later.
Attached is a screenshot of the Instruments app which was ran for around 6 minutes, showing responsible methods for the leaks. They are all AdMob methods.
Hope this helps,
Kerem