In My case
INS Received the documents on 7/31 and approved on 8/13. Does not mean this is the time line as there are lot of people who sent RFE response earlier and not approved yet etc. Only thing is for sure, when INS receives RFE Reply it will directly go to the officer working on the case. So, the time to assign etc are eliminated. Unless they transfer to the local office there wont be an interview. Transfer is usually not done after an RFE. So, good luck.