I hope this isn't too loaded a topic for discussion, but I was wondering something...
I'm almost finished with another of my rereads of Dorothy L. Sayers, which I do every few years, and was thinking about how people in her books relate to and communicate with Lord Peter Wimsey. Everybody that he meets, in every walk of life, speaks to him with a courtesy and a formality, with "my lord," and "your lordship" rather than "you" when addressing him directly. That's not to say that everybody is deferential and bends over for him, but it suggests to me that people in the 1930s, everywhere from London to rural Scotland, or East Anglia, or seaside "watering hole" towns, were accustomed to occasionally meeting peers in pubs or in church, and immediately used this more formal language when speaking with them, otherwise the books would have felt wrong to readers in the 1930s.
I'm curious, is this still the case? Are you taught (for lack of better terms) "informal" and "formal" address in school? Do you occasionally bump into peers in village pubs and use it? Are any lords and dukes out there getting their thrillpower fix to chime in, or are they all collecting inferior American comics?