It is almost certainly the day 0 patch is for consoles only and I'd bet that logic dictates this is what failed certification on console weeks ago causing the latest delay and this is the end result. CDPR weren't expecting a few to get their games pre-launch day so this patch would have automatically been applied during install/setup for those players anyway.
Day 1 patch was confirmed by CDPR the other week and was confirmed for all platforms which will further improve gameplay and graphics.
most games especially console are at the mercy of sony and microsoft and verification. day 1 patch are just the normal now. deadline comes get it out.