It's the first time they've publicly acknowledged what specifically was used in the training set for their LLMs. It's NOT the first time they've said that that

It's the first time they've publicly acknowledged what specifically was used in the training set for their LLMs. It's NOT the first time they've said that that data could be used for research. The presumption was that they had used the data for their LLMs. Maybe it is surprising to some that they this particular research used that data, but it really shouldn't be to anyone aware of how LLM development is done.