It seems to me that the unnecessary verbosity is being actively trained.
Indeed Clinton, that is my experience. Calls when taxiing for fuel and the run ups then blow by blow descriptions of every move regardless of traffic are taught and encouraged by the three local schools around here. They are all RAA. Any attempt to discuss this leads to either ridicule or trotting out "the safety cow". I frequently note calls being over transmitted by needless chatter at an adjacent airfield where the babbling goons are totally ignorant of what they are doing.
My several attempts at education failed dismally, now I just observe :-)