Well, they haven't, but doesn't this Globe story make it sound as if they have?

The Warren Group, a Boston-based provider of local real estate data, said that the August median price for a single family home declined 4.9 percent to $314,000, compared with $330,000 in August 2006; August was the seventh month in 2007 in which prices fell between 4.5 and 5 percent on a year-to-year basis.

To which I'm sure cynical people will respond, "Oh, just give it time, just give it time ..."

Source: Two housing reports, two different views - By Chris Reidy, The Boston Globe