Sorry but how is iMessage being a walled garden not a problem for those outside that wall?
Sorry, I was being a bit sarcastic :P ;)
If you say "yeah sure it is, we're even releasing it as open source" then you prevent the product falling at the first hurdle because people want an interoperable solution. Once you have adoption network effect carries you through.
Sounds like most probably a standard corporate lie by Jobs; do you have evidence to the contrary?
Things that they’ve adopted/forked/bought are but there’s not much they’ve started from scratch and released as OSS.
There is almost no expectation of it from people who know Apple.
Promising something unexpected and not delivering is undoubtedly more damaging than saying nothing.