Not all packages, but if USPS is touching it at any point along the way, expect possible delays. Doesn't matter what type of mail, either.. 1st-class package, Priority, International, etc. This is taken from personal experience, from speaking with postal workers down in the trenches, and from USPS Facebook. I believe it's some sort of tech glitch, which is goofing up their system & slowing down processing. I've experienced a mix bag.. Some on time, some delayed by at least a few days now. Just a heads-up..