Yeah that mixup is the same idea and equally frustrating haha.
If I were writing the article, rather than "However, Bu goes further by claiming that the new lens will offer 3.5x optical zoom (85mm equivalent) instead of the 5x zoom (120mm equivalent) currently available."
I might write something like: "However, Bu goes further by claiming that the new lens will be an 85mm equivalent, instead of the 120mm equivalent in the current lineup."
I do get that focal lengths can be meaningless to non photographers, so the 3.5x and 7x naming scheme can be helpful, just irks me when I see them described as optical zoom lenses. Would be a dream if they were though