It appears that they have decided that stonewalling is their best approach. When that happens, best thing to do is just wait.

Almost every developer winds up missing a deadline sooner or later. It's diabolical sometimes. They hold off making the announcement until it looks like an absolutely sure thing and the day they commit to the announcement, a supplier screws up. Or sometimes they simply aren't good developers. You'll never know. Unless it happens all the time with the mfg you're watching.