[bcheung]

You don't have to wonder, you're looking at it.

https://www.sfgate.com/expensive-san-francisco/article/Bay-A...

"The Bay Area exodus is real and ongoing. The region leads the nation for outward migration, a new study has found."

[mifreewil]

This study is from Redfin and AFAIK Redfin only deals with real estate purchases, excluding renters.