Most fitting coach objection

[JeffM]

Based on the description, I'm in the camp of giving the teams a lot of encouragement to get them on the court with 30 seconds of a close game. One official could have stood outside his huddle to move them along. Perhaps a "we're getting ready to put the ball in play whether you're ready or not" statement would get them out of the huddle. I think it was good that you didn't whack the coach after the "you know the rule comment".

Of course, your association may not tolerate teams coming out of a timeout late, in which case, you definitely did the right thing.

My association isn't real strict about it so most of us tolerate it more than in other areas.

If it had been a problem throughout the game, it should have been addressed earlier in the game. If it wasn't a problem until then, it was simply a matter of timeouts not being nearly long enough for the coach to convey all that he thought needed to be said.