For DAZ this was only ONE working day - Monday. Remember, that in Utah (where DAZ resides), Tuesday started only 2 hours ago. Surely you cannot expect the poor guys to be at work 2 hours after Midnight - they need sleep too.
DAZ was closed for 4 days, which means that many support tickets gathered in that time and DAZ employees will need more time than usual to respond to all (DAZ has many customers, so I imagine, those might be not just dozens, but possibly even hundreds support tickets). Sometimes DAZ needed 2-3 days to respond to my support ticket, but they did.
Actually, I had the same problem as you when I bought Stephanie 5 Pro bundle - some of the download links did not work. I think it took DAZ about 2 days to repair the links.