I'm wondering if there's a similar effect with code. That is, do defects tend to correlate with the day of the week (or the day into the project) when code was written? I'll bet there are some interesting patterns there, should someone care to do the legwork. I've taken it as far as musing about whether there's enough information gleanable from CVS to timestamp each row of a file. At that point, this joined the list of "neat projects that'll never get off the ground in this lifetime."