I got e-mail update from USCIS saying they issued RFE on both my wife's and my I485 on Mar. 9. Till yesterday I still haven't got the letter yet. So I called the 800 number, and got forwarded to VSC. The lady who answered the phone said they are having some backlog now so the letter may not be mailed out yet. She asked me to check back in 2 weeks. Does anyone have similar experience? We have only 12 weeks to respond the RFE, how can they delay 4 weeks on the road!!!