According to Google Maps the driving distance from San Francisco to Phoenix is 754 miles and takes about 11 hours and 2 minutes of driving time.
The article "implies" that this plane took 20 hours to make the trip. The video says that the trip took 19 hours. Hell, the Dude's '73 Torino could have made the trip faster.
This thing is aerodynamic as all get out, too. Not a big, round, bulky tube like an Airbus at all.
Maybe they should have postponed the hype until they had something that could average more than about 40 miles an hour on a short trip like this whilst carrying passengers.