China has now crossed a massive benchmark in the electric-car race: battery-powered vehicles are now cheaper than their gas counterparts. In the U.S., by contrast, EVs still face a steep premium; roughly $14,000 on average, according to new data from JATO dynamics, an automotive data analytics firm. Dan Sperling, founding director of the UC Davis Institute of Transportation Studies, told Fortune he thought the $14,000 figure was overestimated - but conceded that there was a strong, real gap.