I read this article today Surprise, Microsoft Listed as Most Secure OS. Hmm, actually I like the article (obviously) even though there are a few things I do not understand:
This article is based on the Symantec Internet Security Threat Report, which states (as an example):
Microsoft Windows had the shortest average patch development time of the five operating systems in the last six months of 2006. During this period, Windows had an average patch development time of 21 days based on a sample set of 39 patched vulnerabilities (figure 13). This represents an increase over the first six months of 2006, when Windows had an average patch development time of 13 days based on a sample set of 22 vulnerabilities.
Finally, I found this blog entry showing Windows Vista in the first 90 days.
Windows Vista is the most secure Operating System ever!