[zebraman]

I was taught as a 3-person trail to go opposite the way the ball is moving. So as the dribbler goes towards the C, I will "flatten out" as T and move towards my sideline. That puts me in great position once the C picks up the ball so that I immediately have backside coverage. It also makes it so that I only have 3 or 4 steps to the C position rather than the 9 steps that it takes if you "split the court." I'm not saying that your partner is wrong... there are a million philosophies about position. It's just different than how I was taught - sounds more like my old 2-person training.