No, actually major spoilers were released. There was an article on CNN's site talking about two main culprits: a young guy in AU and a 18-19yo in KY. But the publishers worked with the dedicated sites to shut the spoilers down fast and I avoided such sites over the last two weeks.
As I wrote upstream, I read the first 4 chapters at a local store on my lunch break today. The prologue, which is true to form, and one chapter each for the three main PoVs, though all were previously-made-public sample chapters. Fifth chapter is one for Bran that begins with a, "Are we there yet?" I laughed, but didn't have time to read it.