Hi Jamie
You’re right, I’ve been in Germany since 1989, but I go back to the States for a nice long “German-style” vacation (i.e. 4-6 weeks ;)) every year. Tailgating naturally tends to be worse in heavily populated areas — I assume both in the States and in Germany. But the tailgating (and also “dare devil driving”) I’ve seen and experienced in this part of Germany is really something “special”.
Most of my German friends don’t classify tailgaters and aggressive drivers according to gender, but rather by what type of car they drive. The consensus is that BMW and Audi drivers tend to be the worst offenders.
One thing I’m glad about, though. At least Germans drive on the right side of the road. 
But speaking of national driving habits… I once had an Italian student and he informed me that stopping at a red traffic light is seen as completely “optional” in Italy. Do you suppose that’s really true or was he just ‘pulling my leg’?
Amy