On many of my pre-orders with Best Buy, if it's coming from a local fulfillment center they ship it out via UPS the day prior. To make up for additional delays I could see why they may have needed to ship Friday. What I really pay attention to is the destination scan, and the method of shipping.
I've had issues before and what I'll usually do is call UPS, especially if it's local (within a couple hours driving distance) and find the cause of the delay. Normally, there really shouldn't be a reason why they can't deliver it.
For instance my copy shipped today via ground, but it's a local center.