I would think UDP would be better, since they are not concerned with perfect data integrity, just as long as the data gets there before they hit something.
That'll teach me to scoff at Bond. The first thing I thought of was Bond driving his car in Tomorrow Never Dies (10ish years ago), with a device that looks suspiciously like an iPhone.
Yea back that it all looked so futuristic. All we really need is a gyrosensor and some processing power. The iPhone app aint anything amazingly special, its the hardware they built that is :P Wait, no its not.