Propertunity, your graphs (last 20yrs) remind me of the "global warming" crowd, who pick a nice start date (1980) for global warming, extrapolate, and say this is the way it will always be, an upward trend.
Prices, from 1926.
http://wealthruproperty.com/Blog/wp-content/uploads/2010/05/Australianhouseprices_thumb.gif
Rises post war during baby boomer times, and again in the current period. Less than impressive at other times.
I believe we'll be in one of the less than impressive times, and prices will come back 20-30% to trend. (poor FHO ;-) ). Your $800K Sydney LGA median will be more like $550-600K.
While it may be true to say both stock and property have both done roughly 11.5%/yr growth over the last 150yrs, you would have to agree that is not steady. The sharp spike the past 15-20yrs in property, has seen a move that way ahead of historic trend. Why the property bulls don't see a possibility of a 20-30% or 40% correction to trend, I don't understand. I very much do, with what is slowly developing around the world, and am develeraging accordingly.