OK, first of all I only officiate volleyball (but love reading the posts here) and second, I realize every sport has their unwritten rules of etiquette but why should the official be expected to go over to a team's huddle at the end of a time out and take them by the hand and lead them on the court?
Every high school gym I have been in has at least one visible timing device and a horn that can wake the dead. Unless the coach is hearing-impared, s/he should be able to easily recognize when the timeout is ending.
I hope they don't start expecting you guys to fill the water bottles during halftime
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