Remember when Edison said he'd make a generator that was more than 50% efficient and the electrical experts of his day said that it was against the laws of nature and that Edison should learn science? He was still getting bad press claiming that it was all nonsense at the same time that he had already made a generator more than 90% efficient. The problem wasn't in the nature of things. The problem was in some people's understanding of the nature of things. The same things were also said of heavier-than-air flight.
Randall Mills will probably have a bigger breakthrough with another, already-demonstrated, process sooner than these guys.