Easy time in Columbus - EAD
I actually had a very easy time in Columbus. I went to the offices at 7:30 am on Tuesday 13th April and was directed to stand outside in the rain until 7:45. At 7:45 I went in and joined the surge to the elevators.
Once in the offices, I was checked by a security officer (who was very helpful), gave my receipts, completed I-765, and took a seat. I was called in about an hour later to be finger printed and photographed, and I went back to the waiting room. I left by 9:20am with my card.