"and they state australian property is not overpriced"
you talkin' about this mob:
House prices exceed fundamentals in 16 nations: IMF
exerpt -
"The difference between the price gains and fundamental factors, which IMF researchers called the "house price gap", gives an indication of the potential for prices to correct.
Ireland had far and away the biggest house price gap at about 30 percent, following by Britain, Australia, Norway, France, Sweden and Spain."