That's what I find weird, myself, the player. Like people that just doesn't know Lyn at all, just by name. They talk to her like if they were buddies. You know, the countless scenes I have had when she just steps up on the Summit to say something (relevant or not), and then someome completely random to answer "Lyn, it's precisely why..." or "Lyn, that's not what is..."
Something inside me, the player, screams to answer "Huh ? Do I know you ?"
However as I said above it mostly confuses the hell out of me. My character slightly too, but she doesn't care at all. You could call her "Ammatar witch" like Ssaka used to do, that she wouldn't really care, just take note. But considering the education she has had, addressing formally to everyone is rule number 1, and not bowing to someone is tantamount to losing face (like, anyone, even Cael). So, yes, it is obvious that it has to vary a lot between characters.