Terry the human eye cant tell the difference between 60 +, what you actually are detecting is the unstable fps dropping and jumping. if u had constant 100 fps you wouldnt tell the difference to constant 72.
It aint that hard to get high fps. i run the reso 1 larger than 1024x768, 11xxx , forgot what it was and i get 70-100 fps no matter what situation. My pc aint that super either, athlon xp 1800, 768 ddr, 256 meg radeon 9600 XT.
Fighter12 you can increase your fps with abit of tweaking of ur pc and half life settings, although i havnt touched half life for like half a year and ive forgotten most of the commands. Run a search in google for counter strike/ half life high fps settings. Also download a program like powerstrip so you can lock your monitors refresh rate at its highest. Monitor refresh rate plays a big part in how your comp performs in games.