1. I found the following information on my RFE from USCIS: "From the date this office receives your resubmission a minimun of 14 days will be required to process your form. If you have not heard from us within 60 days then you may contact the USCIS ......".
2. Someone posted the message as follows: "For the folks who had a RFE and replied it, hang in there. Your GC should be like 3-5 weeks from the date of RFE recived as I have studied the pattern and proved in my case."
Anyway, be patient, and you will get a decision within 2 months.