I used to regularly travel to Michigan for business. 80MPH on the highway for me and still getting blown past by others. I'm also convinced the Big 3 auto manufacturers have suppressed road repair work up there to make cars wear out faster!
On topic, I only get in the left to pass. If you hang out in the left lane for no reason, I'm going to find a way to pass you and then pay it back by slowing down for a minute.