I'll keep an eye out for the book that details the experiment, I lent it to my sister or something and never got it back. I remember more vividly, they were able to take accurate indirect measurements without collapsing the wave function. It can then be inferred particles inhibit a "true" state without being directly observed, but that is hardly enough proof to overturn the principle I suppose. I looked on newscientist.com and sciencenews.org but couldn't find anything about it.
An aside - I was just thinking about it, I find it funny Greene chose to use Agent Mulder and Scully as his analogous characters, I wonder if it was intentional? Kind of like a "here's why it can't be true, but maybe still possibly - I want to believe"... hm.