Frank, I can only assume the power of pprune allowed a few interested folk become alerted to this issue, I do hope you do not sincerely believe it was this that was the major force in change of mind at CASA.
McCormick also made a number of very sensible comments about the evidence (or lack thereof) for the CTAF/CTAF(R) division, and detailed the research evidence that shows very high compliance rates with radio calls by all pilots, regardless of whether various radio calls were "mandated".
Having had some close range exposure to the study phase.......I would say this is very much the case.
A job well done by individuals and groups involved.
Now all they need to do is sort out the BS about the mandatory calls and some other rules for CTAF R and it may actually be "Worlds Best Practice" downunder. Won't hold my breath.
J