It makes complete sense; as gas prices go higher, Americans are opting for smaller cars.
New models that get 35 mpg or better led most major automakers to stronger April sales. In fact, auto sales are up overall and have been the past three months, signalling a recovery for the auto industry and possibly the economy.
The Coeur d'Alene Press has the details, although I suspect one of them is incorrect. The story states that the average gas price last year at this time was $1.06! Holy cow, that's some cheap gas.