A new study seems to concur with the famous Schneier article:
The following was published yesterday, as part of Symantec's study:
,----[ Snipptets ]
| A test has revealed that a Linux server is far less likely to be
| compromised. In fact, unpatched Red Hat and SuSE servers were not breached
| at all during a six-week trial, while the equivalent Windows systems were
| compromised within hours.
| The report also found that the Firefox browser had fewer than Microsoft
| Internet Explorer, due to a revision in the way Symantec counts bugs; and
| that unpatched versions of Windows last just over an hour on the Internet
| before being compromised, among other findings.
Article URL: http://www.techworld.com/security/news/index.cfm?NewsID=5535