I went to the same location to submit mine today as well, around 12:30pm. There was a bit of a line outside, but nothing too bad. The clerk screening was quick, though my photos from Staples got rejected. Luckily, I had a backup set I took at a convenience store, and those were accepted.
I paid the extra $50 for express since I’ve got a trip this weekend. They told me to come back Thursday between 9:30am and 3:30pm to pick it up. My office is just a stone’s throw away, so that works out perfectly.