I've always been a SUPER nose. I smell everything. BUT, did you all notice that the people in this study were given a Smell Identification Test?
A couple of years ago, I went to a children's science museum with my sister and nephew. They had an exhibit where you BLINDLY smelled stuff and tried to identify what you were smelling. I think there were about 10 or 15 things. I only got 2 or 3 right.
So, even though I DO smell stuff -- I guess I can't always tell what I'm smelling.
If I remember correctly, the test included stuff like strawberry, coconut, banana, lemon, pineapple, etc. I remember getting lemon right -- and maybe banana.