Utah Mormon stereotypes examined: #3 Disrespectful behavior towards adults
"U[tah] m[ormon]s call adults by their first name. In the South you'd be shot for such disrespectful behavior. That would be on par with making a pass at the relief society pres; you just don't do it."
This I find completely baffling. Normally, I can kind of, sort of, at least marginally see where a particular stereotype is coming from, even if I think it's false, but I really have no clue why George from Texas thinks that this is characteristic or stereotypical of Utah Mormons. Nonetheless, he does, so I'll address it.
To reiterate, this is completely false. I spent the first 25 years of my life in Utah — in Happy Valley, no less — and I can't think of anyone I knew growing up who regularly addressed adults by their first name, let alone a core cadre who did so. (If anyone from any other regions of the state had a different experience, I'd be curious to know about it.) My guess is that this is more of a Southern / Yankee split than a Utah / not Utah one. (My Mainer roommate says she regularly calls friends' parents by their first names, which lends credence to the theory.)
My experience is that Utah Mormon youth tend to call adults "Sister" and "Brother," certainly within the ward, but even outside it, to a large extent. I grant that it's less formal than "Mr." or "Mrs. / Ms." ("sir" and "ma'am" being rarely used, except perhaps with strangers), but I don't agree that it's a sign of a higher degree of social informality, overall. If anything, the structure of the Church constantly reinforces the use of formal titles such as "Sister," "Brother," "Bishop," "President," etc., to the point that they're often used by adults when referring to or addressing each other. (I was very startled once to her our SP's wife refer to her husband as "George," mostly because I had no idea who she was talking about.) Calling someone "Brother" or "Sister" is also a nice cop-out when you've forgotten someone's first name.
Oh and, for what it's worth, it's actually OK to make a pass at the RSP in a singles' ward.