I just did the interview for my nephew the other day. They only need to interview 1 reference now, apparently. The interview took no more than 5 minutes. They basically asked the same question 4 times, just worded it different - "do you have any reason to believe _______ should not own firearms?"
When they interviewed both my references, they took 20 mins each.
Seems to be getting a bit more lax. Good in my books.