decaff - 9:16 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...

This is a correct view....

Adding new variables to the algo means that the algo is changing, growing in complexity and size (I suppose one could subtract variables as well...streamlining the algo)

Daily algo changes simply means the ranking variables are being dialed in differently (all the way down to individual page levels in some sectors)

Think of the daily change as a very large 64 channel recording studio control board...hundreds of knobs...to dial in the quaility of the each of the variables that make up the overall sound quality (in this case ranking quality)