In terms of these professional, what is the rough split between first time buyer renters, previous owners who decided to sell up and sit out the boom and exiting property owners trading up (eg apartment to detached house).
As an aside, illustrating the crazy mix these days, I have a friend from England who just bought a house in Las Vegas at 50% below peak (with a US mortgage) in order than her sister who is about to be foreclosed upon (voluntarily) can move in and rent!