On my commute home, it’s normal to have what I call “lane inversion.” The slow lane is the fast lane and vice-versa. That’s due a combination of passive-aggressive drivers who sit in the left lane and go x miles under the posted speed and people who are on their phones and don’t notice when the traffic ahead of them has disappeared over the horizon.
As such, I’m often in the right lane - though I maintain a following distance that’s appropriate to the speed. I am always hunting for an opportunity to get ahead of and around one of the impediment drivers above.