I lucked out and got my 38mm milanese for a 4/24-5/8 delivery.

I ordered at 3:02 am EST.
This is a very difficult item to forecast with the way they set it up. There are 20+ SS different Watch models between the sizes and bands. They might have done better by selling all the watches with a default band and then having the band be a separate order. Then they could have just ordered X 38mm and Y 42mm and had more flexibility at launch.
I think they didn't make very many sport watches because they were thinking back to the 5s launch when the 5c (the budget model) didn't sell and they were short on 5s models. I think they mostly made SS watches since most of those still have a 4-6 delivery window. But this being an unproven product, many stuck with the sport. It will be interesting to see if those who were bent on ordering the sport decide to bite the bullet and get the SS so they don't have to wait.