As credible as any new discovery. It has been peer reviewed and accepted for publication by one of the most authoritative journals in the field. It has probably been reviewed in draft by a large number of experts in the field.On the other hand, it is a brand new. All science is contingent, and a result has to stand for a number of years before it becomes part of the core of science. But this result comes as highly accredited as it is reasonably possible for it to be.