I've seen this shared a few times... and I'm not sure I get why.
I think driving range is an important metric for fully-electric vehicles since recharging isn't easy everywhere in the country.
Otherwise I think MPG is the right metric.
Not sure why driving range of a HYBRID would be a relevant metric, that would be a factor of a lot of things, like gas tank size, which doesn't pertain to efficiency/environmentalism.
Gallons per hundred miles would be a better metric, since it would make it clearer that improving gas mileage of inefficient vehicles makes a lot more difference for gas consumption.
My favorite demonstration of this is that increasing your mileage from 10mpg to 12mpg, from 20mpg to 30mpg, and from 60mpg to 1,000mpg all save the same amount of gas.
So moving from 10-12mpg saves 1.67 gallons per hundred miles. Moving from 20-30mpg saves the same. At 60mpg, you're only using 1.67 gallons of gas, so there's no improvement to MPG that will save more than that. Nearly all the gains to actual fuel consumed will come from increasing the worst offenders rather than e.g. trading in Corollas for Pruises.
Also a good demonstration why the CAFE standards and other government fleet minimums are actually pretty effective at lowering fuel demand.
I think driving range is an important metric for fully-electric vehicles since recharging isn't easy everywhere in the country.
Otherwise I think MPG is the right metric.
Not sure why driving range of a HYBRID would be a relevant metric, that would be a factor of a lot of things, like gas tank size, which doesn't pertain to efficiency/environmentalism.