I had one with the philadelphia office. I went on the 91st day of my original application receipt date, which was about 30 days after my RFE date. I've been told that I can only get an interim EAD after 90 days of an action, and since RFE is an action, they cannot issue me one.
I got approved for my EAD about 38 days after reply. Who knows, maybe your approval is just around the corner.
good luck with iEAD, and EAD likewise