There are a lot of people here who know tons more then me. I am not in real estate in anyway. I am just offering my opinion based on what I see happening to the economy. The others on the board could help you a lot more then I.
I do know that San Diego has always had a premium as far as the ratio of median price to median wage. I believe that it has always been about 4-6 prices vs wages whereas the national average has always been around 3-4. I also believe that it got to around 11 at the the peak here.