Honestly I think that sums up most of the US. Pretty much everywhere I have driven in the US (which is a about 2/3 of the states by now) for the most part people just sit in whatever lane they're in regardless of whether or not they're passing. It seems like there's a few different mind sets that cause this. They seem to be "I'm eventually going to turn left", "I'm not exiting (or turning right) any time soon", "I'm in this lane and there's nothing forcing me to change lanes in front of me", And then there's just people who immediately go all the way over into the left lane the second they turn on to a multi lane road even if the road is completely empty. Some states are worse than others, but the problem is country wide from my experience.
When I was driving in Europe, there was NONE of this. Well there might have been but I never came across it in the almost month I was there. I absolutely loved driving out there and for the first time I felt like I was driving where I was born to drive. Everyone always stayed to the right unless they were passing. There wasn't any road rage (due to self centered inconsiderate morons), it wasn't difficult passing, people didn't go half a KM/h faster then the car next to them while passing simply because they were on cruise control and didn't want to be bothered to change anything with their driving to convenience the rest of the flow of traffic.