This specific subject has been visited several times. Wells Fargo allows both OC and CC here in NC. I carry in 3 different branches here in Fayetteville. At the one I visit most I have had numerous encounters, none negative. I caught one lady staring at my 1911; I grinned and said "Pretty, isn't it?" She relaxed, especially since the Customer Service rep talking to her started joking with me about the comments I get.
I only know of one instance where someone was asked to leave. That was in this same WF branch, and I had a discussion with the manager and with the corporate security manager about it; it was justified. I have also seen others OCing there and no one has ever created a stir over it.
The official stance of WF corporation is to follow the rules of the state. This, is spite of anything ill-informed reps will tell you on the phone. (I would provide the e-mail, Grapeshot, as my 'cite' but I trashed it last year. Sorry.)