I have also heard that the first time the FaceTime engineers found out the protocol was going to be open sourced was when Steve announced it live on stage to the world.

I'm not happy with what happened to FaceTime but I don't think Swift is in the same boat. It seems to have the backing of all the relevant parties and shouldn't face any hurdles like the patent stuff that sank FaceTime. And they gave a hard deadline for themselves to stick to. I'm pretty optimistic about it happening.