Well, heck. Here is a photo I took on December 9. If it looks like not a lot has changed since my last posting in August, you're right. Apparently, a subcontractor was cutting corners, and the thickness of the concrete was not up to industry standards at several places on the top level. Completion of the transit center has been delayed "indefinitely". Here are a couple of links to articles in the Washington Post:

Silver Spring Transit Hub Gets Another Delay (Jan. 10)

Silver Spring Transit Center Delayed Indefinitely (Jan. 13)