Yeah, yielding the passing lane to faster drivers seems somehow courteous to me. Plus, here in the US, it's what you are supposed to do.
It’s a requirement in the UK too, but up to the speed limit. If someone is in lane 3 here doing 70mph and overtaking vehicles in lane 2, you’re not obligated to move over for impatient drivers wanting to break the speed limit who are tailgating you. You pull over when it’s clear and shouldn’t lane hog. I’m quite often going over the speed limit on the motorway like most people do, but there’s always someone who wants to go even faster. They are welcome to kill themselves as long as they don’t take me and my family with them.