this close to release? rumors said week 40 then 44 then 46... we are on week 45 now... and believe me there were serious changes to whole production lines in the past just before release, think thats not the case here, but the camera for example is just a plug-in-chip, recognize that you had 10000 wrong cam chips gets a delay of at least 2 weeks!
Having a manufacturer missing one line on a connector another 2 weeks... its just 10 business-days!
I guess replacing the display at this point is still possible but truly not expected. maybe they found non RoHS compliant parts because some freaking china-fab didn't bother...
sometimes even big companies screw up big time

there are that many reasons 'what?' could happen to delay shippings, I cant even describe all! (I work for an analytical research institute and have knowledge of some serious issues over the last 3 years... from ironing to chip-bonding with 'we have a problem in our manufacturing line please give us results till end of this week no matter what!')