Weather and its effect on plane schedules is hardly the only factor in quality of service. In my experience, and I get many packages delivered to my house (ask my wife), USPS is the service that is the most likely to crush, lose, delay or otherwise f-up your package.
Agree. Luckily so far no delays on my fish but a lot of other things I get online get delayed for whatever reason with usps. Sure does piss me off haha..