Fed-ex is much slower than USPS in my area. I've had Fed-ex deliveries regularly taking over a week.
Update1: I have an order that was shipped using Fed-ex a week ago. This Saturday when it was to be delivered the date disappeared. I checked and it was stuck in Indiana. I'm still waiting for an expected delivery date.
Even with bad weather with other companies, I've never had to wait so long.
Update2: Just received the late package today (Wednesday-18th).