We are on the same boat.

 I've been waiting my parent's biometric  for 3 months, but still haven't receive it yet. I filed GC application for my parents family based in early Aug, and got receive notice(485, 130, 131) with 10 days. And we're still waiting.I called uscis service center, and raised service request, the service request response mail says, application is in system and will be scheduled at local ASC when slot is avaiable... I'm planning to do infopass. I'm in Central. Hope this is helpful. Good luck. Wish all of us.