Eh, thing with the mouse is, some people turn the sensitivity down as this makes it 'easier' to use... now, honestly, you really want the sensitivity as high as you can possibly take it. Yes you will suck for a short time, however, this will be compensated for by the fact that you can actually (almost) hold your own in a turning dogfight. (You still run out of room even on high sensitivity, so you're at a disadvantage there).
The same holds true on the desktop in windows/mac/linux ... on higher sensitivity, it takes some getting used to, but you can get so much more work done it's not funny, because instead of dragging the cursor around all day, you can cross the desktop in one movement, and still have the precision to be able to do detailed work (with some practice, that is!).