Mail service in the US continues to be extremely inconsistent, and not just with USPS but also DHL. Many domestic packages seem to be arriving in a timely manner like mentioned by others, but some are taking wild/inexplicable rides across the country. I had a package sent via USPS First Class from Massachusetts to where I live in Dayton, OH. Currently, it's journey has gone like this:
Massachusetts --> Columbus, OH
Columbus, OH --> Cincinnati, OH
Cincinnati, OH --> Massachusetts
Massachusetts--> Detroit, MI
Detroit, MI --> Texas
The tracking has since stopped updating two days ago.
International seems to have ground to a halt. A package sent to Japan two weeks ago seems to have never even left the US according to tracking info. I'm also waiting on packages delivered via DHL from overseas as those haven't arrived; tracking info on one claims that it was even delivered three days ago.
So, everything is kind of fucked right now. Be patient!