Yup, but it's definitely close enough - especially contrasted against the OP's chosen approach of doing no targeting whatsoever. Also, iCloud's NSUbiquitousKey

Yup, but it's definitely close enough - especially contrasted against the OP's chosen approach of doing no targeting whatsoever. Also, iCloud's NSUbiquitousKeyValueStore gives us NSUserDefault-like data storage that syncs across the user's iCloud account (iOS 5 and up required). This makes the firstLaunchData approximation very near to perfect.