Games : How do I win teleporter battles?

Picture the scene: I've just respawned and some kindly engineer has built a teleporter. Fantastic! I no longer have to walk to battles. I step on the teleporter, which is still recharging. Lo and behold, someone else on my team pushes their way onto the teleporter. At this point the teleporter becomes confused, and since it can only teleport one person at a time, a battle occurs in which the two of you fight for the ability to teleport first. I have found that I have about a 30% success rate in these conflicts, which I would like to increase. In short, how can I win teleporter battles? Is my success determined by where I stand, or else by who is more towards the centre of the teleporter? Or is it instead determined by something entirely different?