Chevrolet Volt vs. Nissan Leaf sales in USA

The sales the most known eco cars in the US are moving extremely slowly.Even so in the first 5 months of 2k11 we've witnessed a small war of the "green" cars between Chevrolet Volt and Nissan Leaf.In the last five months the sales of both cars make a total of 4.351 units which means 435 cars every month.This is very,very far from the expectation of both Chevy and Nissan.If we refer to the rivalry between the two models, Nissan leads with only 17 cars sold more than Chevy.Leaf has the advantage of a smaller price, only 25.280 USD compared with Volt's price of 32.780 USD.On the other hand Volt has the advantage of a much bigger autonomy thanks to the range-extender system(uses a termic engine as a generator.Truth is that both Nissan Leaf and Chevy Volt are far inferior compared to traditional cars.The Chevy official announced that beginning with the next month the Volt will be sold with a discount of 1000 USD.