In Europe, there's nothing all that special about the roads except that people have learned to drive in the right lane. When you take away the speed limit, people just go the speed they feel is comfortable. And if everyone is in the right lane, there isn't the issue of having to do erratic maneuvers to avoid other drivers. Certainly there are speed limited areas and some places have speed cameras. But in Germany, to me it was no different than driving in the midwest until you got to the cities... then it was like any other city.
Italy on the otherhand was both awesome to speed... er.. drive and freaky to drive in the cities (pedestrians walk into the streets even on major throughfares without second thought).