Anthony
I, personally as a controller, talk normally. I use the correct Rt such as Tree for three etc when:
a. I am talking to a foreign pilot, to whom English is definitely a second language (& who if you say anything outside of ICAO standard will just end up in many extra transmissions) or
b. Anyone flying who obviously has problems thinking, flying and speaking at the same time – there are many out there.
Much of the extra words you here out there are thinking time. Many (if not all) controllers at a LARS unit (Mil or Civil) will know the problem of those that hit the transmit before the brain catches up. (obviously that never happens to us ATCOs!).
Many a time have I had a life history, colour of underwear or general synopsis of global political events without being told position, heading, height or destination.