I think that is not true of all highly intelligent people.

There is different types of thinking. I think visual spatial types are more likely to mentally test hypostheses, or more easily than other types of thinkers but because they are different doesn't mean each is not gifted.

I think the early natural ability is "gifted". Now exceptionally gifted, or profoundly gifted. I think the PG label is too easily thrown about these days.