The Bay area is fairly constrained in terms of transportation. Commuting in a car is not possible (unless you enjoy deadlock traffic + paying for parking). Public transportation exists but only works on specific segments.

I would guess a large portion of the individuals in the SF office would live within SF/East bay and have a fairly reasonable commute going to the SF office. I am not sure how far Bart goes south now but typically you would take Caltrain so thats a 45min ride from SF to Palo Alto. Then tack on however long it takes you to get to Caltrain. Easily a 1hr commute.