I had my interview 13 months ago, not many updates during that time. I've gotten a few updates throughout the past month, so I think I may finally be moving onto the next step! The medical exam is only valid for 6 months, so those of us stuck for 6 months+ have to go through the process of getting an updated medical exam once the consulate requests it.
Also, you can request your passport back for in the meantime if you're wanting to travel.