They're playing everybody's favorite game, Fun With Numbers.
The first trick is that they're comparing very different kinds of vehicles. a 4-door sedan and a passenger van (a mini-van in the US?), to the Prius. Of course the overall cost of ownership is going to be very different.
One of the key numbers for a hybrid is what they call "Annual operating costs (variable)," which includes gasoline and maintenance.
$6288 Grand Caravan
As you can see, not even close.
Even if we were comparing non-hybrid cars in our own class, the fact is that we paid a premium because it's a Lexus and a hybrid. So, overall "expenses" will be more because they include the cost of the car, and driving expenses will be lower.
There are obviously people here who are smarter than I am (ie, almost all of them ), but that's how I'm reading it.