That might help, if everyone else does the same thing, and everyone else has the same speed computer. Like the poster above said, the game engine seems to try and sync the game between all the machines, so the slowest machine on the network is going to make the others really slow, when it slows way down, you machine will slow way down and "fast forward" to catch up when the slow down is done. Add in network latency when you have 5 or 6 people all in the same room with about 100 things coming after you, and it will do that no matter how good your network is.