I agree, as an analysis it's utter crap, too bad it's presented as such. As a general explanation and introduction to a layman about the new WRC cars it has some merit, as it compares the road car with the rally car. If they had such a thing for all components (suspension, engine, tyres etc.) it would be a nice resource to show casual fans. But as an analysis it's useless because it compares the WRC to a road car (irrelevant) instead of comparing the different approaches and interpretations of a well defined rule set between each other.

Check this out: http://www.mulsannescorner.com/RCELeMans2016.html
That's how you do aero analysis.