I don't think it's a weird comparison at all: households include dual-income-no-kids households too, and they would skew the average higher. To raise a family in the Bay Area one parent has to stay home, or a lot of money has to be paid for childcare (to the tune of 20-30k per year per kid).

I don't think this is quite the "gotcha, you are actually rich!" that you wanted this to be.

And hey, I googled the numbers too before posting ;)