That’s fair, although I think that depends a lot on the type of car you drive. There’s an option to tell Maps what type of car you drive (electric, hybrid, or gas), which will change the results, because cars with regenerative breaking often get better “city” milage than “highway” milage.
It also probably depends on factors like how aerodynamic your vehicle is, because it makes a huge difference above ~50mph (air resistance/drag increases exponentially with speed)
Added context for anyone who isn’t aware, Schwarzenegger was the Republican governor of California from 2003 to 2011.