Actually - some of the possibilities Mark raises could require a delicate press release. What if XMRV was found in 5% of the population, but not to a greater degree for CFS patients? They'd be announcing 5% of people had a retro-virus doing unknown damage, and with unknown transmission. They wouldn't have been able to take action with blood supply at that point because it's not really practical to start testing every donor (is it?). Maybe it's an even more messy result, with them finding something similar to XMRV? There are all sorts of possibilities at this point. It could well be that they're going to validate the WPI's findings entirely, but my grumpy gut is still saying otherwise.