Sometimes, I'll check my "cadence" with the game clock as I bring the ball up as trail. Other than that, I don't worry about it. If I'm paying so much attention to my partner that I know he's late on counts on players outside of my area, I'm watching the wrong part of the game.
If you're worried about it, consider reviewing a game tape and bring the point up about counts. Check yours and your partners...
BTW, I've seen 3 second counts run into the teens