I have been in Seattle for 5 years. I lived in Boston, Milwaukee, Chicago, Detroit previously.
Seattle drivers aren't THAT bad, but they are irritating if you like to DRIVE. People frequently will drive the speed limit, and think nothing of doing so in the left lane. Its not that they don't know your there. Its just that they assume that everyone on earth is far more concerned with saving the rain forest than driving.
I had a run in with some
pr!ck in a Prius a couple years ago. He is riding in the left lane going 60 mph on I-5! I come up on him going 80 and get on the brakes. I see him look in his mirror at me a couple times. I back off and wait for him to get over. But when there is room to his right, the doesn't get over. I fact he is still looking back at me, as if he is trying to prove a point. So I drop it down a gear and scream past him on the right. Sure enough, some aging liberal twat and his wife shouting at me because I didn't want to play the Happy Green Peace game that day. I flipped them the bird just as the variocam clicked over giving off that beautiful exhaust howl. It made my day!