So you want empirical proof the that market is dropping to a certain level before you would concede that it reached that level? I wonder when the market recovers and booms again, if you'll tell your clients "well the market is not that high yet, so let's be realistic in pricing." Or will you tell your clients "let's shoot for that 20% extra, because I think you'll get it."
I'm guessing that you'll go for the latter because that will create new comps and new listing opportunities. You're not going to wait for proof-positive comps before you price higher. So why wait for comps to price lower?
My point is that the current "value" to a buyer is based in large part by expectations for the near future. I believe that ocrenter is calling that near future very accurately for San Marcos.