but that's the most logical requirement for parent's 485, how did you guys miss it ?

. I have read in other people's posts about it...hence threw it on the wall, seems to stick in ur case.
Currently uscis gives 90 days. I just read today that they are going to make the RFE response time variable depending on the type of RFE.
you guys are ok, 90 days is a good enough time to send anything sent back. It's just that u might lose 30+ days for the case processing to resume after ur RFE is recvd by them.
http://www.murthy.com/news/n_timrfe.html