"One possible reason for the disparity could be the growing popularity of the higher-end luxury electric models available," Zabritski said.
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That theory in falls in line with data compiled late last year by data tracking firm Edmunds, which found that the Tesla Model S had become the most frequently registered new car in eight of the nation's top 25 wealthiest neighborhoods, tracked by zip code.
That included Atherton, Calif., zip code 94027, where the average home was listed as $6.7 million, and where the Tesla Model S was commanding a 15 percent share of new vehicle registrations. In nearby Los Altos Hills, it was nearly 12 percent.
The Experian study also found that motorists purchasing an electric vehicle had a higher average credit score of 749, compared with 741 for hybrid owners.