For anyone who is wondering about the 11/18 date for Best Buy, it's a stock system entry and doesn't necessarily correlate to your order. The reason is that the PS5 releases on 11/12 and 11/18 is 7 days from then, including 11/12. I verified this at work today. My order doesn't have a label yet, but it shows as receiving by 11/18. Anyone calling Customer Service over the phone may get a confused call center person telling them what they see, not understanding what that means. It just means you are guaranteed the system by 11/18. And yes, dates are estimated by the carrier. So you'll likely receive label information before a carrier has picked it up and scanned it. Tracking information isn't always the clearest, unfortunately.
I have to get back to work, but if I find more info I'll update everyone here.