It was quite obvious watching the program that they were aware the battery was running low (they commented on the "miles left" meter several times). They more-or-less willfully ran out of juice in a small town. So what.
The point wasn't that the car can only go 60km versus 100km on a charge, or whatever the numbers. The point was that the car has a range limit, that the limit is not terribly far, that the car takes a while to charge when it dies, and there aren't many charging stations.
Perhaps Top Gear was a bit hyperbolic to make that point (Consumer Reports they are not), but these are all fair points.
I'm sorry. I'm all about calling out bias where I see it, but this just smacks of a car maker trying to spin some largely legitimate complaints with their product.
Not many people could get away with owning a plug-in electric as their only car. Even if it were half as much as a comparable gas car (rather than twice as much). As Clarkson said in the episode, the leaf is actually a really nice ca and electric is obviously the future, but today it is just not practical.