Actually, we don't know that, yet, even though we suspect it. It comes down to the contract and when UPS was supposed to pick up the phones -- if Samsung had told them the phones were available for pick up and UPS had the delay, the clock started when UPS was informed to pick up the phones.
I also wonder, if for some of them, UPS has picked up the phones but not opened the container yet. As mentioned, Samsung will pack shipping containers to various cities; in those cases UPS will often pick up the container (and the container is scanned) but the individual packages are not scanned. So, when container is opened at the destination city, the packages then get scanned but the shipping gets "back dated" to the point the container was picked up. This is why some people state they basically don't get informed that the phone has been picked up until it is out for delivery.
Hopefully we'll get some type of update today/this evening.