It is not too strong. GP specifically claimed that simultaneity depends on "where you're standing". This is wrong in all reference frames. As for timing of dis

It is not too strong. GP specifically claimed that simultaneity depends on "where you're standing". This is wrong in all reference frames. As for timing of distant events, GP didn't make any reference to other reference frames at arbitrary velocity, only different positions. In our reference frame, which they were implicitly talking about, the merger (assuming the prediction is correct) was in the past, unambiguously.