Thanks for confirming that I am not crazy to be annoyed by this!
She is coming to stay with me for a visit in a few months. I think I will be able to address this then, although I suppose it will be unlikely to come up naturally. She is, in most respects, a very good friend, but as some have rightly pointed out, is a "big city snob". I think it is partially stemming from insecurity, and partially from snobbery. We have been friends since childhood, and she used to be much more of a snob about pretty much everything (parents' professions, toys, having longer hair, having a "prettier" eye color, etc.), so much so that my parents limited our contact for a while as they were so put off by her behavior. She has grown tremendously, or else I would not continue the relationship
, but some things (like this) are just obnoxious.
If she persists, or acts as though I'm the weird one, I think I may point her to this thread