I love FEDEX (sarcasm). I had a package shipped from Oregon to Maryland. In one day the package moved from Portland, Oregon to Baltimore, Maryland, arriving there Friday. The package had an 'estimated' delivery date of the coming Tuesday.
Now I live maybe 10 miles from Baltimore, and we have FEDEX trucks driving though our neighborhood several times each day. So why, Tuesday morning, is the package STILL listed as 'at dest sort facility', exactly what it said last Friday?
I believe the sorting/distribution centers (and probably drivers) see the phrase 'estimated delivery' and decide for themselves that they don't HAVE to deliver the item until that date and act accordingly.
Really, really poor attitude for a company that makes it's living delivering packages.