I am a one man operation. Most parts orders ship within two business days, unless the part requires a warehouse trip. Stocks can take up to seven business days to ship, since they require hand selection from my warehouse.
I do take time off during the year - when it's just a long weekend I do not put a notification on the website. When I am gone for longer periods, I will put up a notice on the site and a note on your invoice.
Stocks ship via UPS, parts orders generally ship USPS. You will receive tracking from Stamps.com when I run the shipping label. When the package is picked up, I update your order in the system to "Shipped".