those speeders are death traps i say. everytime i mount one i'm helping the other team out. the physics are funky to say the least ...
not to start some sort of bash/debate but i just finished playing a few hours of the t:v multiplayer demo and the vehicle control in that seemed much more "natural" than what's given in BF. Granted, the vehicles are necessary in this game but horribly difficult to control. furthermore, the speeder bikes on the Endor map don't help much other than allow the imperials to make it to a spawn point quicker. it's easier to run over enemies than it is to kill them, and chances are you're likely to hit a stationary tree before you hit a member of the opposing team.
most of the time i end up like princess di