It's both - expressing revulsion has a normative component, and so does even experiencing revulsion.

To illustrate: If I eat something and exclaim, "Oishii!", that not only expresses that I am "experiencing deliciousness", but also that the thing I'm tasting "is delicious" - my wife can try it out with the expectation that when she eats it she will also "experience deliciousness". It is a good-tasting thing.