Apple is still subject to NSLs, and like Lavabit, can be coerced into operating in such a way that they're able to provide message contents to authorities while advertising that they are in fact secure.
Is that seriously what you believe?
You cannot perform an audit on your own. You are trusting that you received the correct keys without a way to verify identities outside of the network.
That is not secure. Please read http://blog.quarkslab.com/imessage-privacy.html
White paper on the topic: http://blog.quarkslab.com/imessage-privacy.html Consumer grade article: http://arstechnica.com/security/2013/10/contrary-to-public-c...
Lavabit offered in-network public key encryption for its users. Its implementation was faulty and investigators only needed an SSL key to get the information they wanted from suspects. They also ordered Lavabit to keep operating under the pretense that they were secure. http://www.infoworld.com/article/2609583/encryption/how-secu...
Skype was advertised as "end-to-end" encrypted AND peer-to-peer networked for years, until it was slowly exposed as a lie. Skype's content is not end-to-end encrypted and the network is centralized. http://arstechnica.com/security/2013/05/think-your-skype-mes...