Good article, and it's promising to see some concrete examples of falling prices. I don't really think of Renton or West Seattle as being far from urban job centers though. Neither is Redmond or Downtown, but we aren't talking about Enumclaw either.
The only part I have a difficulty believing is that prices will stabilize suddenly after a huge plummet like that. If we've seen anything from the current trends, it's that there's a momentum to price changes.