The answer is Maybe. CCD doesn't necassarily follow the same guidelines(?) as Winterkill. But, I don't know if anyone can say how many Winterkilled colonies were actually the result of CCD or CCD related.So, no one knows the answer to this question?
I actually think that may be a pretty fair statement. While there is a definition out there, it seems to mean different things to different people and sometimes becomes a catchall diagnosis. Some beekeepers (myself included) have never seen large unexplained losses where bees suddenly disappear but many beekeepers including some that I think are exceptional have experienced it. A recent experiment that Randy Oliver conducted may have provided the most compelling evidence to me that viruses may play the biggest role. It does, though, seem to be more of a fall and winter phenomena and good nutrition and low varroa mite levels seem to be the best defense against it.So, no one knows the answer to this question?