tedster - 6:06 pm on Jan 7, 2007 (gmt 0)

I noticed that too, but I think it made sense taken in context. When Matt said something like "the algo hasn't changed for over a year" I understood him to mean that no new factors were added. When Adam said something like "the algo changes constantly, sometimes daily" I understood him to mean that the way the established algo factors are weighted changes constantly.