Yes. These gravitational wave detections are the only direct measurements anyone's ever made in regions of such strong gravity. If strong-field gravity betrays any failing of the theory of GR, we'd expect to find it in gravitational-wave waveforms.

That these waveforms (the first one, in particular) appear to follow the basic GR plan at the time of the merger is actually kind of a bummer. As a physicist who makes precision tests of gravity for a living, I'd really hoped that we'd see something unexpected. Instead, the new thing that we learned is that GR continues to be an accurate model, something that was perhaps unexpected on its own.