My trip from Frankfurt to Heidelberg was my first introduction to the autobahn. Let me just say that we were doing 150 in the SLOW lane in a Ford mini van and there were plenty of Mercedes and Porches passing MUCH faster. However, Germans are very good drivers so those speeds don't even feel that fast. Germans prove that driving fast does not equate to driving bad. There was no tailgating and everyone always indicated.
BTW...I've never seen so many people driving German cars before (hee hee, that is my joke for the day).