That is very odd. It was expected for my 24'' iMac to arrive on the 13th, shipped out on the 6th with 5 day shipping. from Shanghai to Alaska to Pennsylvania. Instead, it arrived in only 1 day - got it on the 7th (even though I'm not at my location to pick it up 🙁)
Usually, I find that things be FedEx ship faster than I expect. Unless specified, I do not think they ship on Saturdays, so waiting until Monday would be a good idea. I highly doubt that FedEx would take 10 days for anything, even through Apple's free 5-day shipping and certainly not for overnight.