The EPA test is not at 60 miles per hour. It's between 24-60 miles per hour, averaging 48 miles per hour, with frequent speed changes. Then it is reduced to a smaller number than the actual result based on the weight class of the car and on a constant they apply to all cars since the tests still measure too high. When the HAH changed weight class, its EPA mileage went from 30/37 to 25/34, yet the real-life mileage hadn't changed at all. EPA is not realistic.

But for whatever reason, the values for this car do indeed appear realistic. Road & Track test-drove a Camry Hybrid and they got 38.3 mpg going "75-80 miles per hour mountaineering around LA" (i.e. lots of climbs, up to over 4200 feet from sea level). Motorweek test-drove the car and the averaged 38 mpg though they didn't say what types of driving they put it through.

Also keep in mind my short test-drive didn't change the previous tank average of 29.1, due to acceleration and hill climbs.

Similarly, my 2006 HCH gets 60 mpg cruising on level roads around 60 miles per hour, despite its EPA score of 51 mpg highway.