Matt L,
Compared to the same model with power assist, the car in your example probably has different alignment settings or steering geometry designed to make the steering effort tolerable without power assist. Also, the power-assist version may only require 2 or 2.5 turns lock to lock.

Power steering is designed so that the steering will still function if the assist fails. There is only a slight added drag from the fluid and servo piston in a non-functioning power-assist system.
If you jack up and support the front end of any power-steering equipped car, with the engine off, you will see that the added effort required to turn the steering wheel is minimal, compared with the effort required when the car is on the ground.

Happy Motoring, Mark

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DrDKW