The rough answer was in the Q&A tonight.
I recall reading "late Monday evening GMT", i
REALLY hope he said morning and not evening.
I believe they are based in the USA to the east.
Do not quote me on any of this, wait until the Q&A is cleaned up and released.
The only reason i can see them delaying the digital download release is if the extra hired server guys (mentioned in Q&A they are putting the download on a external server or something so the DL rate doesn't take a dive like a cliff jumper without a parachute) are having a brain fart. That or they are running around mad like a bunch of chickens with their heads cut off trying to stuff as much extras into the Day 1 update like trying to stuff a 2 gallon bucket of dressing in a still live turkey.
I'm hoping for #2 if they are late.