This is untrue. Are you seriously attempting to use a colloquial joke as some sort of evidence?
While Germans are a bit more conscious of driving in the left lane when not passing, what you are saying neither makes sense, nor is it applicable, especially in any amount of traffic.
It also totally discounts the vast amount of road construction and maintenance that Germans continually do on their roadways (infrastructure maintenance is a big deal). The construction alone, especially in Hessen/Rhineland Pfalz vastly impacts travel times in ways going 40kmph faster could never attempt to approach.
While Germans are a bit more conscious of driving in the left lane when not passing, what you are saying neither makes sense, nor is it applicable, especially in any amount of traffic.
It also totally discounts the vast amount of road construction and maintenance that Germans continually do on their roadways (infrastructure maintenance is a big deal). The construction alone, especially in Hessen/Rhineland Pfalz vastly impacts travel times in ways going 40kmph faster could never attempt to approach.