The article is talking not about the route planner, which I agree usually gives very accurate estimates for specific routes, but the advertised theoretical driving "EPA ranges", which are quite inflated.
However, from what I can tell, the EPA numbers from all manufacturers are quite unrealistic, because the methodology doesn't match real-world driving.
Yes, this is certainly true for ICE vehicles. The measurement methodology is spelled out in exacting detail, and yields highly repeatable results. Realistic? Nope, not at all. Nobody could claim that. But, it is repeatable and comparable, so that you can compare car A to car B. It gives you a strict rank order for vehicles that are driven exactly the same way, it just so happens that no person drives exactly that particular way. The utility is in providing a repeatable point of comparison. Is that useful?... forgive me for saying it, but YMMV.
The problem with EPA range is that it's a compromise between highway range and city range, so it's almost guaranteed to poorly match your driving unless your daily driving mix equals the averages. This is a consequence of insisting on one number, not inflation.
Inb4 "just pick highway range and be conservative" -- no, because then you will buy a car with great aerodynamics and terrible regen and spend all day driving it around the city using the terrible regen and not using the great aerodynamics.
However, from what I can tell, the EPA numbers from all manufacturers are quite unrealistic, because the methodology doesn't match real-world driving.