Yes -- the GMAT has a history of treating both "data" and "media" as plural. But I think it's a non-issue. Notice that in each of the examples you cited, you don't have any choice: in the first one, "New data... show" isn't even underlined, so it has no impact on the answer. The other two examples are CR, and the subject-verb agreement isn't our problem.
So you deserve 20 points for attention to detail! (Hopefully the GMAT folks will apply those points directly to
...
So you deserve 20 points for attention to detail! (Hopefully the GMAT folks will apply those points directly to
...



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