Games Workshop is moving back its pre-orders by one day. (we had heard a few small comments made regarding this). This is happening immediately starting this weekend according to the announcements have seen.
thanks to ShadowWolf32387 for pointing this out.
via Games Workshop: Riverbend on Facebook
Hey everybody! Just wanted to give you a heads up. Pre-orders go live on Saturday at 12:00 pm this week instead of Friday. This will become the new policy globally going forward. This means that you can place your pre-orders for the next week and pick up your new releases on the same day! If you have any questions, let me know.