Steve Jobs expects to return at the end of June

I don't read anything into this. If they need to change Steve's plan to return, they can't show they know until there has been an announcement. Having that information, but waiting until someone asks for it, would be failing to disclose it. If the plan changes, they will announce it, but not as an answer to a question. He punted and referred to what they said previously.

If there is a change to the plan, given how they have handled this so far, I would expect it to be announced shortly before Steve is due to return.