all 3 launch options got removed with the last update
before the update it worked exactly how I wrote. what do you think the "accel" in "noforceaccel" stands for? and the "spd" ind "noforcespd"? go figure.
seriously, this is basic knowledge. don't be stupid and pick up every urban legend you find in the internet.
you can't just tap out while playing CS and check the windows mouse settings. if you tap out of CS most (or even all) function of CS which force Windows to something get deactivated (like forcing a different resolution).
let me explain you something: CS is very old. it was built for Windows 98/ME. the programmers of CS coded a function to "deactivate" the variable mouse-acceleration of Windows 98/ME. I wrote "" because it was actually not just a deactivation since a there wasn't an proper/easy way to just deactivate it - they actually programmed a function which forced windows to calculate the acceleration with a new value. Now the things is that in Windows XP/Vista/7 Microsoft completely changed the way the mouse-acceleration works. This caused following problem: Everytime CS calls this function, which should force windows to calculate the mouse-acceleration with a new value (to kill the acceleration as good as possible) the new windows versions misunderstood this command and actually re-activated the deactivated windows-function "Enhance Pointer Precision". Long story short: this CS function, which originally should kill the windows mouse-acceleration as good as possible lead to the exact opposite on newer windows versions: it re-activated the already deactivated windows mouse-acceleration.
Valve never deleted this function (because people with Windows 98/ME would still need it). instead they came up with the new launch option "-noforceaccel", so people with Windows XP could play without mouse-acceleration.
instead of tabing out you could just check the acceleration ingame. you will notice that only noforceaccel deactivates the acceleration, while noforcemparms doesn't change anything at all and noforcemspd changes the sensitivity in a linear way (depends on your windows sens to some part)