Top Gear is a joke.
That being said, the problem is that EV battery technology is still young: Most manufacturers state the upper-limit instead or something realistic. For an example: smartphones nowadays usually go past their claimed battery life despite that before it was hard for them to stay on for an entire day.
I own a Nissan Leaf and am well aware that range depends upon a series of conditions like weather, excessive acceleration and braking, and climate control. THIS IS TRUE OF ALL CARS, but matters more in EVs.
That does not mean that anyone would be well-served by an automotive review that lists towns and distances traveled, but which then misrepresents the car's state of charge to pretend its battery is completely discharged when it's actually over one-third full.
I doubt anyone purchased any car based upon their recommendations or takes them seriously when they "review" cars.