You will likely be waiting awhile. I pre-ordered on April 1st and it only showed as "in progress" on Thursday. 19 days after I preordered.
Yo yo @Meowmix!
I think it was a chip issue. They pretty much told us that the Snapdragon 835 would be a little delayed production wise. All things considered it could have been much worse.. I mean it could have been RIM or Nortel?