Most experience officials will nail that coach's team first. Coaches also learn the officials tendencies just like officials know the coaches. If they have been around a while they know if an official tends to call somethings tight or likes to try to talk the players out of violations and fouls early in the game. They also know who they can successfully "work". Some coaches rarely say anything...so when they do if usually means something.
A good example was one of my last games before the health "vacation". I warned both teams a couple of times about 3 second violations (keep in mind, I count slow so when I get to 3 they should have already moved). I finally called a violation and the coach yelled at his player "If either of these guys are calling you for 3 seconds you have been in there for a week. Move your butt." I almost spit my whistle across the floor.
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