Hi Michael -- That's too broad a statement to make and it's not factually based on anything. Way too many variables, which is why the only real thing we can say is that location plays a huge role. In SF location drives higher salaries due to both cost of living AND huge demand.
I've seen this number several other places as well, varing from 96k to 104.
I live in Atlanta. I get articles from Georgia Tech about the tech job scene here as well as averages for different majors, etc. If you really really really want me to find an email from Tech, and stick it on the web I will.
I get Austin numbers talking to people I know there...
I have housing market comparisons for all three cities and Vancouver due to talking to friends in all three areas.
But look at housing costs, etc. You'll find depending on what you want (big house/short commute/etc) SF may not be the right place.