The study that just came out said that something like 3 out of 37 healthy people have XMRV, and 32 out of 37 sick people have it. While this definitely proves a correlation between being sick and having the virus, what's interesting is sort of lost in the numbers. If there are far more healthy people than sick people, it's actually still the case that the many--maybe even the majority--of people with XMRV are nevertheless healthy. Think of it this way.
Let's say that in a population of 20,000 people, 100 have CFS, and 19,900 are healthy. And let's say that everyone with CFS has the virus, but also that of the 19,900 that are healthy, 200 have it. These numbers don't match the study perfectly, but they're a good way of getting the point across. If this were the case, it would mean that you still have a 2/3 chance of being healthy even if you have the virus.
What this MIGHT mean is that you need more than just the virus to become sick. You also need to be very stressed so that the virus is able to kick into gear. And those who aren't stressed never get sick because the virus has no chance to express itself.
Again, just a thought. No matter the news that's coming out, I still know beyond a shadow of a doubt that my sickness is much worse when I'm stressed, and basically non-existent when I'm optimistic, happy, and totally unstressed. And so, the studies are not incompatible with my belief that CFS is ultimately about stress.

