If so, 'twould explain why they're pushing things like the Volt. Figure if your "fleet" is one Volt getting 100MPG, and 10 other cars that people actually want to buy, getting 25mpg... then the "fleet mpg" is ~32 mpg. And so on.
Makes sense to me, it's a way for the automakers to sell things that people actually will buy.
Light trucks were exempted from the CAFE for years, as only passenger cars were counted.
The switch to pickups and sport utility vehicles was a marketing ploy to accomplish two things: Hide the high cost of UAW benefits in a high cost product and circumvent the CAFE standards. (Its easier to stuff $3500 of health care costs in a $35,000 truck than a $9,000 compact). Remember, just before GM went under it had 100,000 emploees and 1,000,000 retirees.
The current standard is 27.5 mpg for passenger automobiles and 20.7 mpg for light trucks, a classification that also includes sport utility vehicles which are light trucks with passenger bodies.
So lobby Congress to change the rules and presto: fuel efficiency!