[Ksyrup]

The people who sit in the left lane are routinely going slower than the flow of traffic or, sitting at the exact speed as the cars to the right of them, unwilling to move over and gumming up traffic. They are a huge problem.

I don't disagree with you on "superspeeders" (although I don't know exactly how you define that). Certainly, excessive speeding is dangerous. But this is not an either/or situation. The a-holes sitting in the left lane are not necessarily slowing down "superspeeders." They're just blocking the flow of traffic. If you aren't going to actively pass someone on the right, you should be on the left unless there is excessive traffic where everyone is more or less doing the same speed and using all available lanes.