Supertasters

I'm listening to the new food course from Yale online.  The most interesting fact so far is the existence of supertasters.  Basically, some people react to tastes much more strongly than others.  For instance, a supertaster might experience broccoli as extremely bitter.  I'm constantly amazed when people don't like things like olives or avocados.  Perhaps if I could experience their presumable super-reaction I'd dislike them as well.