Wanted to add our experience to this thread. I tried to get on in the middle of the day yesterday, and had the window open for 2 hours with no response - had to shut it down to do other things.
Today, I decided to wake up to be online at 7:00am, and we were on the video chat within 20 minutes, approved very quickly and I was closing out the conversation with all 5 days of advance selections made by 8:00am. DD was actually still in bed when they needed to see her for the picture, as I'd been anticipating a much longer wait so hadn't gotten her up yet. They took the picture with her lying down, lol. Forgot to put her glasses on for it too, but the CM said that wouldn't be a problem.