rican, the fps bugs are true, and its based on the quak 4 engine not 3, i say based on cause its half and half, 125 fps is good for long distance jumping, 250 is even better for long distance jumping and allows you to jump a little higher and 333 just makes you float through the air and silent run to people who are spectating you, you can hear yourself run if you got 333fps but other people cant, also if you have 250fps your gun will shoot faster than having 125fps, give it a try with an AK-47, use like 70~fps cap and shoot a clip then change your fps cap to 250 and shoot a clip, it will shoot faster.
Ohh and another thing to show its based on the Q4 engine is strafe jumping.
Ohh and btw CrazeD they fixed half of the fps caps that you mentioned its now, 125, 250 and 333, all them fps caps give you big advantages hence why professional players play on low`ish graphics so they can achieve 250fps constant on all maps.