It is important to note that SharePoint only runs on a Microsoft stack and some have speculated that SharePoint is the next operating system from Microsoft. One of the goals of the survey was to examine the influence of SharePoint and the Microsoft stack on the open source community.
Previous surveys have shown that community members tend to evaluate on a Windows laptop and in deployment the majority turn to a Linux server.
http://www.linuxlinks.com/portal/news/article.php?story=20081120143008582