Here's what the developers have to say concerning the matter here (
http://forums.lucasarts.com/thread.jspa?threadID=5906&tstart=0):
- PC Multiplayer Frame rate lock – The framerate lock is set to 20 by default. You can set the values to 15, 20 or 30. To change the settings, go to the main menu and select Options/Online Options and then change the “Ticks per second” setting.
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WTF? They don't even give a hint that they might be fixing this! They just state what everyone already knows. They really shouldn't have made a online game if they don't know how to do it properly! Have the developers played any online game in the past five years? Obviously not if they think that it's okay to have a frame rate limit this low in the year 2004!