I have mentioned before the lack of data regarding real estate which is one of the reasons why it is hard to take any short term pronouncement about real estate seriously. There simply isnt enough quality data to make these sorts of judgments and this situation would obviously be of benefit to land rats since the less information people have the more obscure the true picture.
The yanks have gone some way to solve this problem – the image below is of price reduction map for US real estate that is searchable by city, state or zip code. It friggen clever, simply click on the image to be taken to the site.