To me, and I know I sound ignorant, but this study, once again, fails to inform me of anything with regard to XMRV. The criteria, the samples, the cohort, and the fact that the PCR was only done once per sample, as far as I know. Mikovits and the crew at WPI have clearly expressed that this is a difficult task, to identify the XMRV in the specifically defined (Canadian/Fukuda criteria) cohort. Mikovits has made it known that they did four PCR test cycles on each sample to get their results. The WPI has stated their willingness to share samples, and so forth (as in their last press release). Until the scientific community begins to work together on this one, we will keep seeing these pseudo-replications, with negative results and meaningless conclusions.
After 15 years of this disease, I have to have hope in the idea of a retrovirus, until which time this hope can be either validated or invalidated by proper scientific inquiry, and collaboration within the scientific community.