That's no definition of DO I've ever heard. A list is a classic example of a non-data oriented structure!

DO as I understand it is about recognizing how data is actually laid out and interacted with by a processor, as opposed to meaningful abstract relationships to a programmer. It's about breaking down costly abstractions, rather than ignoring the cost of higher level abstractions.

DO exists primarily in opposition to OO, not FP. The classic example is the array of structs to struct of arrays (OO to DO transformation).