The interview date was about a month and a half out from our date of being DQ'd. The interview itself went really well and it was fairly easy. We received the visa in a couple days after the interview.
Not sure if it helped us but we uploaded a ton of evidence of our relationship online on the CEAC site a week before our interview. We only got asked three basic questions about how we met, what job I do in the US, and if we have any kids together.