The reason you're reading this on some nerd website and not every single news outlet is that this was the strongly expected result - we see photons affected nor

The reason you're reading this on some nerd website and not every single news outlet is that this was the strongly expected result - we see photons affected normally by gravity all over the place, we see CPT symmetry hold up everywhere we look, and negative gravity would be hard to square in with a general relativity way of thinking. That all said, the opposite result would have been huge. We know our understanding of gravity is flawed to a degree we don't know about flaws to the theories of (at a low level) literally everything else we're aware of in the universe.