Well, in my experience people who self identify as utilitarians don't appear to be any more shortsighted in terms of real life moral quandaries than people who don't so self identify.

I don't think it's the case that utilitarians tend to be shortsighted, just that people in general tend to be; if non-utilitarians tend to choose a less shortsighted action in a constructed moral dilemma, it's not usually due to consciously taking a long view.

When I was in college, a professional philosopher once visited and gave a seminar, where she raised the traveler-at-a-hospital scenario as an argument against utilitarianism (simply on the basis that killing the traveler defies our moral intuitions.) I responded that realistically, given human nature, if doctors tended to do this, then because people aren't effective risk assessers, people would tend to avoid hospitals for fear of being harvested, to the point that the practice would probably be doing more harm than good. She had never heard or thought of this argument before, and found it a compelling reason not to harvest the traveler from a utilitarian point of view. So as a non utilitarian, it doesn't seem that she was any more likely to look at questions of utility from a long view, she was just more willing to let moral intuitions control her decision, which sometimes has the same effect.