Dom sayeth:
(in my opinion and from my perspective of course, though I would tend to think this should go without saying).
Depends on the statement. If I say this thread isn’t about the Oscars…that’s kind of accurate but mostly not true. If I say this thread isn’t about Syria, that’s definitely accurate. Whether something “is about” something sounds like a factual statement.
Nothing is factual when it comes to art, especially when you’re talking about what something “is about.”