It's actually an amusingly backwards thinking article-- EVs suffer a range hit relative to ICEVs on highways because they're so much more efficient at turning energy into motion. ICEVs turn 80% of the energy stored into gas into waste heat (radiators, convection, hot exhaust gases), so the percent that the aerodynamic drag hits them just comes out of that 20% of energy stored in gas that they turn into motion. Their baseline inefficiency persists, and dwarfs the aerodynamic drag.
Whereas EVs are significantly more efficient at turning energy into motion, with very little being wasted as heat, so any additional load (drag) comes from the energy source.
Amusingly backwards thinking. It's like claiming heat is more efficient in an ICEV
