Someone sent me this link today. Makes interesting reading for those that like that sort of thing. I don't really get what he's trying to say, though, other than that the d20 System is different to the original Cthulhu System.
http://www.udallas.edu/mathdept/faculty/wmwhite/games/cthulhu.html
http://www.udallas.edu/mathdept/faculty/wmwhite/games/cthulhu.html