I am not sure that the simulator is updated for minor versions. You will need to run the app on a device that is running 6.0.1. Xcode 4.5.2 is the latest production release and comes with the 6.0 SDK. Xcode 4.6 Beta 4 is the latest developer release and comes with 6.1 SDK.
Bottom line is that you can't test against 6.0.1 in the simulator, you need to test on a device with 6.0.1 installed.
To test this just NSLog
this:
NSLog(@"iOSVersion = %@", [[UIDevice currentDevice] systemVersion]);