It's overblown until we get the 2010 data for the tri-county Metro Detroit area. In 2000 that pop was 3.9M. If it rose in the last 10 years I would be very surprised. BTW I am a former Oakland County resident.
I, too, would be surprised if the Metro Detroit population rose, based on what I've heard from friends still in the area. But I'd be even more surprised if it declined by 25%.
Not saying that the area's not in trouble. It is. But the difference between "in trouble" and "dying" is significant.