What times of day are you driving? I can tell you that when I drive 101 south, I get stuck at the construction chokepoint at the East Palo Alto IKEA (between University and Embarcadero), and that adds at least several minutes of slow-and-go driving compared to before the construction started.

The only way I'm driving fast down 101 south is if I'm there at 11 am. Which counts as morning, but is also unreasonably late even for salaried workers in a relaxed company.