This is exactly what i sometimes do with gk v corner.This one is all about context. Sometimes the players' reactions are a very good clue that they all know and agree what happened. This isn't a long wait--it's a pause or slow signal to read the immediate reactions of the players. Of course, you have the teams that act like every TI is theirs, and you quickly realize that you can't take any cues from that team
The players give you the naswer is a couple of seconds (most of the time).