From your link:
"...so when is the Release Candidate and RTM? The answer is forthcoming. We are currently evaluating the feedback and telemetry and working to develop a robust schedule that gets us the right level of quality in a predictable manner. Believe me, we know many people want to know more specifics. We’re on a good path and we’re making progress. We are taking a quality-based approach to completing the product and won’t be driven by imposed deadlines. We have internal metrics and milestones and our partners continue to get builds routinely so even when we reach RC, we are doing so together as partners. And it relies, rather significantly, on all of you testing the Beta and our partners who are helping us get to the finish line together."
A normal person would say that like this:
"...so when is the Release Candidate and RTM? We don't know yet. We need to evaluate all the feedback we're getting from the beta version, and then we'll be in a better position to answer your question"