They do get a bit keen on the word "heavy" in the US. In fact to the detriment of other things. I have been told to "taxi behind the heavy" before - now I'm sure wake isn't a problem on the taxiway and which "heavy" did she mean?
Bonkers.
Putting it in your callsign in times of close separation and on intial contact is a good idea I think, but for area control it is a waste of time I reckon.