House price recovery is 4 years away

I caught this article in the Financial Times referring to the predictions of a bunch of ecomomists. The survey was conducted by the Society Of Business Ecomomists for ITV's Tonight programme ( possibly in my view the most detestable, sensationalist, current affairs programmes on TV - how Trevor Mcdonald got a knighthood I will never know - having fronted some of the most one-sided coverage of current affairs on the box - But anyway - back to what I was saying)

In it the majority of economists perceive that prices wont return to the 2007 high for four years, in 2011.

Now the question in my head is how low will they go and at which point will they start their upward path.

These economist are saying that that within a four year window from now, prices will recover to where they were in 2007. That means at some point in the next four years there will be a optimum buying opportunity.

The question is will the opportunity be 2008, 2009, 2010 or early 2011?

Whose going to start the bidding?