slaves on follow

[Jafula]

Ok, im going to apoligize from the start for the completly noob question......

I see videos of boxers and many of their slaves are following very close to the leader. I cant figure out wtf im doing wrong, if anything, but my slaves are following me but are (or seem to be) a good way away from me.
How do they get slaves to follow really close?

AFAIK there is nothing you can do. Lag. Do the slaves seem close to the leader on the slaves screen?