Which version of iOS is the May 12 security paper referring to? Apple has published a paper on security controls in iOS, which specific version is this referring to?
The given information seems pretty generic to me. A statement of how Apple manages security with the iOS devices seems more plausible rather than how security is handled with a specific version of it.

iOS 5 is referred a couple of times in the paper, though, while no earlier version are, but in a very vague way.