Probably dev preview will be released before you get a L930.
Will be announced, but to arrive in stores/retails, it takes even longer.
We haven't heard anything from the front page so wait for an article before we start moaning too much. We also know this delay, if confirmed, covers the preview not final release and even if it did it will only make for a more stable release. Let's not let frustration get the better of us.
I've been telling everyone about the WP developer preview and 8.1. If there is one thing I can depend Microsoft on, it's their ability to find awesome ways to disappoint me. I hope this doesn't mean a huge delay. For our sakes. This wait since mid Jan or so when we first heard about the leaks has been painful.