No - I was absolutely serious. If you travel slower than Speed Limit + 9 in the left-most lane when traffic is clear, you will annoy people, cause people to swerve around you, and generally increase the odds of an accident.

Drivers who are driving slower than this speed need to move over rightwards. Speed Limit + 9 is a minimum speed for the leftmost lane.

It's actually more like speed limit + 15-20, in the fast lane.

Try going less than 80mph in the fast lane on 101, 280 or 880 when traffic allows for it. Just try.