Again, the median is a clumsy and inaccurate way to quantify the amount of increase or decrease. By using it these reporters are actually going to exacerbate the panic, which probably will lead to the overreaction the RE types so rightly fear.
I think what this big percentage of change is indicative of is the reduction of new homes being sold and the belated reporting of the trend that has been well underway county wide since the beginning of the year. The change itself isn’t accurate, except to the extent that it nudges the median closer to what has been happening all along.