September 11 memo only apply to the cases that are filed after September 11. If your case is filed before that date, they will not reject it without issuing a RFE of NOID. If you are concerned about timely approval of your case, switch to premium processing for good. Most probably you will get approval given your case is strong. Even if your case gets rejected, you will have enough time to act accordingly. Nowadays, it is not guaranteed that your case will be decided within 240 days.