I just published some of my thoughts on the Microsoft Get The facts campaign at kfwebs.net.
An interesting observation to this is that although the analysis is performed by independent sources, they are often sponsored by Microsoft or an affiliate. I agree completely with the last sentence "Get the facts, and make the decision that's right for your business", but get them yourself, and don't trust a single source of information.
Now don't get me wrong, Microsoft has its place and in many situations it can be profitable to use Microsoft applications. Their collaboration suites have potential and management of many computers can be relatively easy. At least in theory. The problems come if you try to use a non-Microsoft system in addition to the windows computer, as Microsoft for one keep their communication formats and document formats for themselves, as well as changing the application programmer interface (API) constantly with little documentation.