I must admit that this thought already crossed my mind a couple of times and I also emailed Paolo Martella the author about my suspicion and he said: Read the FAQ. Anyway now Zardon from Driverheaven has started this thing: He also found out severe result differences on the same as well as different setups. Check the thread here for his findings. On a personal note some of you may have read my Radeon driver comparisons in which I stayed with some significant point changes in the 5xxx-6xxx range. I received a new system and my results were even lower than with the old one! (OLD: AMD XP 1800+, Radeon 8500 | NEW: P4b 2.4Ghz, GF4 Ti4600). Leave your comments if you have a similiar experience. More info on GLExcess: Product homepage