Obaminator: GREAT POST!!
As a side point, anybody who has been involved in shiduchim understands calling somebody by their first name actually does.
When a boy and girl are going out and want the shiduch to “move on” and “take it to the next level”, the shadchan often advises the young man to call his future Kallah by her first name. And for the girl to do the same to her future Chosson.
This often helps them to take their relationship to the next level.
YES. Calling someone by their first name does mean something!!