The LIGO project is a bit like a rich man's Michelson-Morley experiment. To simplify the explanation, they fire a laser beam into the centre of the contraption, which splits the beam sending it down two perpendicular 4km arms to mirrors. The beams bounce back to the centre and are redirected to a detector which checks to see if the peaks and troughs of the light waves are still aligned. Last week LIGO announced that the emerging waves were very very slightly not aligned, implying that the difference in the two arms' lengths had varied by 0.0001 times the width of a proton in a way that looked like the gravitational waves predicted by general relativity (GR) due to two black holes merging.
I've been asked whether this is relevant to MiHsC. The answer is that if it really is from a high acceleration distant process then 'no' since MiHsC usually only makes a difference to GR at very low accelerations or large scales (of the order of 10^-10 m/s^2, or tens of kpc), and at higher accelerations MiHsC reduces to general relativity since in that regime the MiHsC inertial mass tends towards the gravitational mass (if it's due to local changes in light speed, then it might be relevant).
The search for new data is a fantastic thing, so LIGO should be congratulated for that. The thing that bothers me about the gravitational wave paper is whether the twin black-hole merger scenario they pigeon-holed it with can be falsified or tested independently? I suspect it can't, and so this is like a lot of post-modern physics: unfalsifiable.
Imagine someone invents a Theory of Exploding Mushrooms (TEM). They have brilliant success predicting small mushroom blasts at home. Then people using ear-horns hear odd bangs from the distant forest. "It's my theory of exploding mushrooms!", the scientist says in glee and enthusiastically calculates the size of the unseen mushrooms that may be exploding. No one can go to check this prediction, and some people grumble that with the greatest respect, the TEM actually only managed to predict 4% of the exploding mushrooms that have subsequently been seen on the edge of the forest, and also the theory is incompatible with the famous Theory of Quantum Fungi...
In the gravity wave paper (see below) they say that the merger and the 'ring down' of the black hole are consistent with each other given GR, but this is an example of fitting using a computer model. They have found the black hole model that fits the data, but no one can go and look. It is not falsifiable. So it is not science.
Carl Sagan once said: extraordinary claims need extraordinary evidence. This applies to this case. They are invoking extraordinary directly-invisible entities and this needs independent backup. I feel that the usual standards are not being applied to the pathway that the majority of physicists occupy.
Abbott, B.P. et al., 2016. Observation of gravitational waves from a binary black hole merger. PRL, 116, 061102. http://arxiv.org/ftp/arxiv/papers/1602/1602.03837.pdf