I _just_ went though the line. It wasn't too bad (5-10min, despite having bio ID), but it was by far the worst I've encountered at SFO in the decade I've been flying out of there.

P.s. And as usual, TSA doesn't understand anything about queueing theory and doesn't implement round robin / starvation prevention. Global services and clear get absolute priority over other queues.

Probably because people are going via SFO when they might otherwise go via Oakland or elsewhere.