It seems pretty obvious from context that the author is discussing Haskell's flavor of functional programming in particular. It's somewhat lazy phrasing, but it

It seems pretty obvious from context that the author is discussing Haskell's flavor of functional programming in particular. It's somewhat lazy phrasing, but it doesn't seem unclear to me if you read more than the headline (and if you didn't read more than the headline, you wouldn't know he was talking about something more specific anyway).