Automakers actually do their own testing and submit the results to the EPA, which reviews the data and confirms about 10-to-15 percent of the ratings itself at the National Vehicles and Fuel Emissions Laboratory (which is how Hyundai and Kia were supposedly tripped up on their understated fuel economy estimates).
To say that it looks and feels Korean is actually quite a compliment these days, given how impressive both the restyled Kia Optima and Hyundai Elantra are.