[epistasis]

Well all I can talk about is the 1970s-era boxes that dominate in the Bay Area, which is the major population center that PG&E serves.

If your experience with these homes is different somehow, let me know. But go to SF, go to the peninsula, and you'll find that most homes barely stop air coming in and out of the house, much less have proper insulation. A blower test for SF homes would shock most people in the modern world.

[jandrese]

In LA sure, you can get away with minimal insulation. SF is a different story. That city is shockingly cold. An uninsulated house in SF is wasting loads of energy.

[baggy_trough]

Yes, my experience is that you are simply wrong.