Plug-in sales (which is the broad term used to mean both fully electric cars and plug-in hybrids) haven't quite yet set the world on fire, but as I wrote almost exactly one year ago, they are doing "much better" than hybrids did at the equivalent stage in their development. I wrote:
Four years after being launched in North-America in 2000, the Toyota Prius hybrid had cumulative sales of around 52,000 (the Prius passed 3 million units sold last summer), according to IHS Automotive. Four years after launch, the Nissan LEAF electric car had cumulative sales of over 100,000 units. Four years in, the Chevrolet Volt and its European twin the Ampera have over 70,000 units sold. The Tesla Model S hasn't been around for four years, but its cumulative sales should be over 30,000 now, and accelerating fast. And then there are all kinds of other plug-ins selling in fewer numbers but making progress, with new models waiting in the wings.