I've seen one or two other Volts in town and one Tesla. As you get closer to Boston there are a fair number of Tesla's but no Volts. I've never seen a Leaf in MA, I've seen one E-Golf that parks in the Christian Science Center garage that's across the street from Symphony hall. I attribute the dearth of EVs to the climate, battery range suffers terribly in the cold, the Volt doesn't have the range problem but it also doesn't have all wheel drive, I decided to live with the lack of all wheel drive when I bought the Volt because I was so impressed with electric drive but I never would have considered and ICE car without it.
The Tesla's relative popularity I attribute to the fact that it's a Veblen good for people who ordinarily hesitate to buy a Veblen good. Flaunting your wealth has always been considered tasteless in New England, for example the mansions in Newport were all built by New Yorkers, I don't think a single one was built by a Bostonian. As a result you never ever see a Bentley or a Ferrari here. But the Tesla is special, it's a > $100K car but it's also a symbol of environmentalism so if you drive one you are telling the world that you are very green and by the way, wink wink, nudge nudge, I can afford a $100K car. The Volt is a Chevy which is the antithesis of a Veblan good, Chevys are everyman cars, so buying a Volt can convey the message that you or green, or in my case that you love tech, but it doesn't say anything about your wealth.