Depends on your language use - hrs talking in terms of semitones throughout the article, so thats correct; you're thinking in terms of whole /half steps (so you would be correct if the article was written in those terms).

I think talking in semitones helps clear up any misunderstanding over the explicit intervals present in a chord (and I've found that very useful when talking to guitar pupils who only know guitar and want to understand theory, particularly because the guitar neck is made of semitones), but if someone knows more scale theory (or plays piano), then talking in scale steps makes more sense.