[Ididntdothis]

That’s definitely something you notice on the German autobahn. The ones that are 1mm on your rear bumper or constantly give you “Lichthupe” are often smaller Mercedes, BMW or Audi. I have rarely seen sports cars like Porsche or Ferrari behave that way.

[hwj]

I can confirm that.

However, it's probably because there are much more Audi/BWM/Mercedes on German Autobahns than Porsche or Ferrari.

[agumonkey]

often I wish that roads had "wiper" cars that would fill the whole width and drive at the maximum limit and not more. :)

[PappaPatat]

Much better solution: https://en.wikipedia.org/wiki/SPECS_(speed_camera)

Basically two cameras at a set distance that measure the time it took from location A to B and calculates the average speed. Works like a charm: no more speed differences.