USPS delays
For what its worth, Canada Post is just as bad, if not worse in my opinion. They have had their multiple strikes with me and I will only use them if I have to. I had a package wrongly delivered to a city over two hours away once, and after calling Canada Post, they didnt seem to concerned, until I told them that it was a .357 magnum Colt Python, then I had that package in my hands within a couple of days :)