Last time I started around 4000th in the queue and they sold out when I was 39th in queue (with 8% of tickets left).
This time I had IE open up on one monitor, Firefox on the other monitor. Then I spammed F5 on each one as fast as I could and I was 3000th in line when it came up. I managed to get tickets this time
I had a friend that was 100 behind me in the queue. He got to the checkout, realized he had to have a battlenet account, merged them, then had an error during checkout. Tickets were sold out at that point. About 5 minutes later he tried the process again (because you get 15 minutes) and it worked and he got his ticket ???