TE Paul,
I'm sorry that I came across as "spewing crap". I honestly tried to answer your question as well as my time and ability allowed.
I was in Australia last year, and went to visit the supers at Royal Melbourne, Royal Sydney and a couple of others. I don't believe that their approach to managing Poa is much different to what I have seen in the U.S., the U.K., or continental Europe.
There are many variables, including climate, soils, budgets, golfers' expectations, and availability of useful chemical products. The same super would probably take different approaches if he were in Scotland, Paris, or Sydney.
In the Paris area, for example, the best greens are predominantly Poa annua. This includes St. Germain, St. Cloud, St. Nom-la-Breteche, and Chantilly. The cool, wet weather of northern France makes it practically impossible to keep the Poa out. The old courses like those above evolved into Poa greens years ago.
Golfers and supers have come to accept Poa surfaces as superior to bent for this area. The main drawback is Poa's susceptibility to Fusarium disease, mainly from October through April, and the necessary expense of spraying.