They lost our passport photos, just so happened, I gave our attorney extra photo's so he sent them to USCIS the same day he receive his RFE copy. Just received the NOA2 hard copy a few hours ago, two days after the approval
When you receive your hard copy, make sure you note the response time frame, they usually give about 30 days to return, and make a copy of the letter for yourself and return the original with your evidence. Should take on the average 14-21 days for your approval