I don't buy into the argument of being a target either. I have to CC at work, so most days you will not see my gun. However, on weekends I tend to dress differently because my activities get a lot more physical in nature when I am not at my regular job. So most of the time I OC on weekends. When I do the reactions are 98% positive. Not many people OC in my part of the state. I've seen a few people give me a surprised look, and seen a few whom appeared to be of questionable character walk away.
Since I both CC out of necessity and OC out of choice, I have thought about whether or not I act differently depending on the method of carry. The only thing I have determined through self analysis is that my SA tends to ratchet up a notch when I OC.