The issues with the mice are this:
for the slow ps2 mouse syndrome....
The scanrate of the mouse actually is much lower than the refesh rate of the monitor so the screen is acutally moving faster than polling the mouse and thus the true mouse position on the screen isn't rendered. This causes you to second guess your movement and thus jerky positioning can result.
for optical vs balled....
This one is elementary laws of physics and common sense. How a standard mouse works is via a simple led and light sensor. On, off, on, off that's all it has to deal with.
And optical mouse is slightly different... via various eprom chips (or insert specific techno babble here) and a more sophisticated optical sensor an optical mouse actually records luma values that it gets at two or more points. When the mouse is moved, the previous readings are compared to the new ones and it decides the direction that was moved by comparing old point a to new point b and ect... Needless to say this more "analog" approach is much more inaccurate and there is a great margin of error as the surface isn't normalized in texture. or alignment. The only way you could possibly make an optical mouse as accurate as a regular mouse would be to paint a fine grid in a box and only move the mouse, via a robotic arm (so no twisting of the mouse's orientation) inside the box. You see the light values a traditional mouse gets are from a fixed source, namely the spoked wheel inside it. The "spoked wheel" on an optical mouse is your desk. Now if you think that an optical mouse even has the potential to be as accurate as a fixed wheel mouse then you are just kidding yourself. Hopefully that will convince any skeptics.
I wanted to give a quick, simple explaination (see my last post) but you guys forced me to explain it to you. Sometimes you guys should just trust me on this stuff.
It's a measurable fact in both cases... and it IS a big enough difference to be perceptable by the human reflexes. That is unless you have poor reflexes of course.

Yes a optical mouse is much easier to maintain, but that doesn't make it better, jsut like McDonalds isn't a better restaurant than Red Lobster jsut because McD's is more convenient and more people eat there.