I sent I140 NIW in March, 2005, then changed job to Boston. On our travel way to Boston in June, I got the RFE notice. My lawyer told me that it might because of my job changing or simply because the officer did not touch my case. Then I suffered a lot of depression symptoms. I sent the RFE supplemental material on September. Today we got the I140 approval notice through Email(it was approved on last Friday). I think most RFE cases will be approved.
Be patient and good luck to everybody