Bill Reinert, Toyota's U.S. alternative-fuel vehicle manager, points out that this 65 mpg figure is from drivers who were instructed to pilot the test car the same as any other vehicle, so there are no hypermiling techniques required to achieve the mileage boost. Of course, the car must be plugged into an outlet to recharge its battery pack and fuel but mileage and range are still mostly determined by the driver's right foot. This is one reality that affects any car, including hybrids and fully electric machines.
[Source: Automotive News - sub. req'd]