I say another week and a half till time announcement of Beta, and another 3-5 weeks until it starts (picking random people like WCIII beta?). Then the beta will likely be a month and a half to two months, allowing balance and time to finish the story finishing with a late summer release or early fall. That is what I have said for awhile, and i'm sticking to it.
Scratch that I'm moving my prediction to mid to late fall. That article is misleading on how close the beta is. It sounds based on blizz forum speak that it is farther away.