Originally Posted by
RichardInSF
Customs at SFO does not distinguish between foreign or US citizen and immigration is before the bag carousels, so I don't see how customs can take 20 minutes unless selected for inspection. If immigration does take 40 minutes, it is more than enough time for bags to reach the carousel.
As a U.S. citizen with only carry-on bags, walking fast to immigration, most of the time I am through both customs and immigration in less than 5 minutes.
Ignoring the nit-pick, to most people customs means the process between getting of an international flight and entering the landside area of the arrivals hall.