There appears to be debate on this question, which is puzzling to me. I think many people are mistakenly under the assumption that "small, fuel efficient" cars equate to miniature so called "smart" cars that we see every so often on the road and in Europe, as opposed to simply something other than a gas guzzling SUV or crossover vehicle. In fact, most sedans today are very fuel efficient.
Will U.S. consumers buy these cars? Well, that question has actually already been answered. As you can see from the chart below, the top 5 best selling cars in the U.S. get more than 30 miles per gallon on the highway, and #6 on the list isn't too far behind:
