Think about the implications of all this wasted time. Officers forced to use Microsoft Outlook for their email clients have to labor to search in their mail! If they can do it at all! I've written before about the benefits of GoogleDocs for intelligence operations: you network in colleagues to see your files and they can edit your assessments & situational reports; get a real-time picture of ground truth as you find it; add questions or additional analysis or taskings; and a higher synthesis is possible, right then and there. Whatever its virtues, a PowerPoint presentation is a dead document. A GoogleDoc is an evolving, networked one. Which makes more sense for capturing a slice of a war?
The answer probably has something to do with the fact that the military is a huge apparatus that needs software that can run on any machine, which makes Windows the imperfect solution to a perfect logistical nightmare. Still, it's kind of scary to think that, in the midst of the 360-degree battlefield that is Afghanistan and Iraq, the men and women charged with keeping this country safe spend the majority of their time making PowerPoint slides.