Lubos Motl is a smart guy, but he's known for having his own somewhat strongly-held opinions on quantum mechanics. I don't believe his assertion that it's a "crackpot paper", but am sympathetic to his argument that Nature is over-hyping the paper.

I would really need to sit down and read the paper carefully (as well as Motl's rebuttal) before I can have a more informed opinion than that, though.