There are two more charts at the bottom: looks like both Ford and Chevrolet are overestimating in cool temperatures. But during higher ones they match EPA.
Everybody advertises the EPA numbers, and that's generally what people use when buying new vehicles. This article isn't about the EPA numbers, it's about what number is displayed as the range on the dashboard. And on non-Tesla's that number varies based on driving conditions, so it'd be a poor number to base buying decisions on.
To be fair, the EPA's rules have basically left the door open for them to do it. In addition, their customers tend to be very tolerant of their product quality issues. Other automakers don't enjoy such latitude.