You're forgetting some of the reasons surrounding this. Just to be a little more complete...

The Volt is in the $40,000 range - much cheaper than the Fiskers and Teslas. ...and the Model S Tesla is far under $100K.

The Volt has an image problem because of testing that was reported as showing batteries catching fire. What the press buried at the end of of articles, if they included the facts at all, was that the batteries caught fire THREE WEEKS after the accidents when the cars were stored in their wrecked condition without any coolant. Any idiot would know to disconnect systems after the accident. But they kept these cars in 'laboratory conditions' and that's when it happened.

The last knock on the Volt was that the Nissan Leaf EV was outselling it. Now, that's no longer true. The latest figures have the Volt outselling the Leaf.

The Volt has basically had to re-launch itself and is doing surprisingly well, given what it's been up against.