Unless Daniel moved, we were at Harvard instead of MIT 
I have not read Sabine’s paper so I do not know how justifiable it is. However I have read McGaugh et al.'s paper that was the impetus for her theory in great detail.
As most astrophysicists, I subscribe to the “slightly-perturbed”-Lambda-CDM model, i.e. the idea that while Lambda-CDM got some details wrong, it is pretty much correct (especially at cosmological scales).
This past few years, our worldview has been rocked by a slew of results showing that perhaps Lambda-CDM is not as accurate as we thought. The strongest blow was dealt by the McGaugh et al. paper, which shows that certain properties of galaxies are better fitted by MOND-type theories.
Nevertheless, a full reconciliation between what I call “slightly-perturbed”-Lambda-CDM and McGaugh et al.'s result is possible, and I do not think that the blow was strong enough to dethrone the reigning theory.