it really does depend on the mouse you have.
I used to have a microsoft intellimouse, and now have a logitech mx-510, and both have come with their own software, part of which lets you choose how many lines you want to scroll with every "click".
If you're that annoyed by the scrolling given to your mouse, I'd search to see if there is software for it, get a new mouse that does have software, or download
USB overdrive, which lets you customize most products that work through the USB port.