Ok- I just made a reservation for my own upcoming trip in June. It took less than 5 minutes and I received a confirmation email immediately.
First I entered the restaurant choice. It asked me if I wanted to associate my dining reservation with an existing resort reservation. Then I entered my date, time desired and number of guests. There were boxes to check for DVC member, Tables in Wonderland and Annual Passholder. Then it checked availability. My choice was available so I reserved it and got my confirmation email at once. So far, so good!