Time Keeps On Slippin'

This is picture of a watch.  (Source: Wikipedia)

A couple of months ago, the Virtuosi Action Team (VAT) assembled for lunch and the discussion quickly and unexpectedly turned to watches.  As Nic and Alemi argued over the finer parts of fancy-dancy watch ownership, I looked down at my watch:  the lowly Casio F-91W.  Though it certainly isn't fancy, it is inexpensive, durable, and could potentially win me an all-expense paid trip to the Caribbean.

But how good of a watch is it?  To find out, I decided to time it against the official U.S. time for a couple of months.  Incidentally, about half-way in I found out that Chad over at Uncertain Principles had done essentially the same thing already.  No matter, science is still fun even if you aren't the first person to do it.  So here's my "new-to-me" analysis.