I believe this stems from a paper that came out about how some large percentage of PHEVs never plugged in. The large caveat was that a large amount of that data

I believe this stems from a paper that came out about how some large percentage of PHEVs never plugged in. The large caveat was that a large amount of that data was from company vehicles for employees. Which those employees have very little incentive to actually plug in since typically the company pays for fuel costs.