PS,
You are barking up the wrong tree. I don’t know what the numbers are nor do I care. I am not putting my self out as a person who is going to deliver economic and statistical clarity that is missing. You really need to think through what you say better if you aim to do this.
For example, you say “Last year, 68% of all home loans in San Diego were negative amortization or interest only. 68% of all loans made are not even paying principal.” I personally know many people with loans that could be neg am but who are paying fully amortized payments. How big a percentage they make up is irrelevant as the point is that 68% of all loans are not paying principal is an untrue statement if only for the the dozen or so that I know.
As for SocalMtgguy, I’ve read his blog for a very long time and enjoy it immensely. He has some good points and is a good writer. But my impression is that he was in the business 2 to 4 years at most which certainly doesnt make him an expert that I would relie on as THE source of reliable info. You have a bad habit of relieing on inexperienced RE professionals as experts.