The reason I don't believe it's sure, is CDPR hasn't given exact date and time when the PC version pre-download will start. Not 100% sure of the unlock time either, although Im going by midnight UTC due to some people more experienced with CDPR saying so.
So far the only one we got is playstations pre-download which might just be something that playstation says cause they got to say something.
They have given exact time for actual rellease date.
I dont see how not mentioning specific pre-load times has to do with it. Sounds like something you would do 1-2 days before hand, or not at all, because is that really news?