I've never tried multiplayer with FS2002 because of the slow dial up connection I have here. Imagine my surprise when I finally decided to give it a go and it umm, well, it worked with almost no jumpiness (a little at first and then it caught up and was smooth as silk). I actually got faster frame rates than I often do single player mode.
If you haven't tried multiplayer in FS2002 because of connection speeds, I suggest giving it a try. This is actually the first game I've had since I moved where dial up was the only connection available that works in multiplayer mode.