A particularly nasty breed of Macintosh user who deems it necessary to tell you why your system is inferior to their Mac. It is futile to attempt to counter their arguments. No matter what you say they will not be swayed. The advertisment of MacOSX as being Unix has given most fanatics an even larger superiority complex.
There is no way to fight this.. I suggest you liberally apply a shovel or crowbar to any MacFanatic you may meet.