My timeline:
Eb3, priority date June 2002
RFE on 485 for self March 2005, spouse a couple of weeks later.
Replied to RFE beginning of May. Received notice on June 8 that our case was transferred to Cincinnati, Ohio
Made infopass appointment to visit Columbus and was told that Cincinnati was the office that received files from the service center and that Cincinnati would forward the files to Columbus.
I arrived at the Garden City DO at approximately 10:15 this morning. My interview was scheduled for 11:25, so I decided to try my luck and see if the security guards would allow me to get in early. They politely told me to come back at 11:00, so I dropped my fiancee off at Bloomingdale's at the Roosevelt Field Mall and drove back to the parking lot at 711 Stewart Avenue. I should mention that there is plenty of free parking available, so don't worry about where you can leave your vehicle.