To be fair, its method of assessing the security of operating systems is somewhat bunk. It sets a figure based on the number of vulnerabilities found rather than the importance of those vulnerabilities or whether someone fixed them quickly. You know that there is something wrong when the fruity cargo cult Apple ranks rather low in the list when its “three wise monkey” approach to security vulnerabilities is legendary.
However, the figures should wipe the smug smile off the faces of those open saucers who claim that Linux and all who sail in her are much better than iOS or Windows.