It seems like only a few actually get shipped each day. It only took like a week to go thru the 4/15 orders and I can't imagine that 5 days after preorders began there was a huge rush on this model.....
There seem to be a good number of people in the 5/14 - 5/20 delivery window (US). Perhaps there is a big shipment coming in early next week. I know it's the first day of the window, but if the 14th comes and goes with no movement, I'm going to be sad.