Gabelvampir: FYI, it's the same for backers that ordered a Steam key.
LongPike: Steam Backers have already received their keys.
Yeah I heard that, probably received keys, but the game isn't unlocled yet (i.e. it isn't playable).
GOG does not really have that functionality (AFAIK they only did that for The Witcher 2 and maybe 3), so it makes sense to me the GOG keys get distributed a few hours later.
I was referring to a mail they sent to the Kickstarter backers which also referred to Steam keys with the same times.
But then again I'm not in a hurry to play this, I#ve backed the Kickstarter so the game is more then 5 years late to me, a few hours don't make much of a difference.