The problem is you can't really write an article like this for used cars because there's too much inconsistency. With new cars you at least know what models are made, how they compare, etc.
If you open it up to used cars, you get survivor bias (say the K car is really the greatest car ever but their owners tend to wreck them 95% of the time) and way too many models to compare and way too many issues to compare and contrast.
That said they could have put "new" in the title. Still a useful article, these "new" will be "slightly used" hopefully by the next time I go car shopping.