I had a brief reread of the articles discussing the theory. Bear in mind that my personal background is in Cosmic Inflation and so I'm not intimately familiar with this theory. From what I gleamed Einsteins Equations can predict an object that is essentially a concentrated bundle of Vacuum Energy, which is a commonly theorised candidate for Dark Energy. This object would look and act like a Black Hole to outside observers. Therefore, any Black Hole that we observe could in fact be a source of Dark Energy, and we wouldn't be able to tell with our current understanding of the model.

Essentially its a mathematical model that has been proposed, rather than any new observations.