Yes, I've heard of supertasters. In fact, we were discussing the subject at a dinner party last night: one of our group and the daughter of another are both supertasters. The daughter, who is now about 11, still has an acceptable menu of only 12 or so foods; everything else is just overwhelming to her. The group member who is a supertaster has a bigger menu, but is still limited in that he cannot abide spicy foods and only takes real pleasure in the things I would call unforgiveably bland.