I wonder what their reasons are? Needing more range? More room?
I'm not sure I'd buy the gas price argument. I think most realize gas will eventually go back up in price. Most likely sooner than later.
http://dailycaller.com/2015/04/21/record-numbers-of-drivers-trading-in-electric-cars-for-suvs/
The article is junk. Sales of
traditional hybrids (like the Prius) have flattened out over the last couple years (before gas prices fell), and some commentators have been lumping EVs (both battery and plug-in hybrid) with those numbers and saying the 'entire category is down'. The whole Obama angle is a bit of a tell for the article agenda, IMO.
Actual sales numbers show that EV sales have been rising 20-30% per year since introduction (only in December 2010, just 4.5 years ago), including last year. In 2014 EV sales in the US were 1.4% of all new cars (all EV models are cars), or 0.7% of all light vehicles (including SUVs and pickups). This is a more rapid growth curve than seen in traditional hybrids (10 years earlier), despite the logistical issues of having to install a charger in your home or apt building, limiting public charging infrastructure, etc.
EV sales growth is slowing, most likely due to the fact that the big selling models are getting due for an update....some folks are waiting for the 2016 Volt, the Tesla Model X (delayed), the Gen 2 Leaf or Tesla Model 3 (both 2017?), etc. The used EV market is still in its infancy (given the tiny sales volume in 2011-2012) but exists and used EVs are selling.
I can certainly believe that regular hybrid sales are flat or down, perhaps the market for efficient cars was saturated, folks only got them for the mileage (not the fun driving experience), EVs might eat into their sales from the green end (I would never get a Prius), etc. I can beleive those are sensitive to gas prices, and folks were adapting to gas prices even before the prices collapsed.
In contrast, most folks that get EVs say they 'will never go back', and love the electric driving experience and the low maintenance, etc. Folks that are less happy with their EVs still love the segment, and tend to switch to EVs from different makers.