[Reeve of shinra]

While basically correct in its statements, there are some additional factors that need to be added in.

Namely, when the holiday first started, there were fewer people celebrating christmas and due to the various calendars and difference of opinion upon the day in which xmas should be celebrated, santa had nearly 10 full months to do delievers, with an extra month for random stops back at the shop and a month off as is due a ceo of his calibur.

Since then with the global growth santa had to expand from a one man operation with a cheap factory full of inexpensive pointy eared midget labor to a limited liability company based out of england where there are currently a dozen employees working full and part time to ensure quality delivery of goods nearly 24/7 wherever you are in the world.