So, again we have Lattner saying that Apple hasn't even considered releasing it as open-source. Still not seeing the part where Apple is going to open-source it.

Also, he said they have stuff to do before the release this fall. That happened, and still not a word about it. I don't see how you can possibly take this "We haven't even talked about it and I can't say when we will" as a declaration that Swift will be open-sourced. It is the opposite. It isn't a firm denial that it will ever be opened up, but it is definitely a denial of any plans to do so.