I love data! And, since I am hyper-focused on all things Visual Studio and Team Foundation Server, I love data about our internal usage of the products we sell to our customers. Make no mistake, we are hard-core users of the same technologies we ask you to use. Case in point is the publishing of our internal TFS statistics. You can find all the good data in the great post by Erin Geaney here:
Make sure check out the stats so you can get a feel for how we use TFS internally at Microsoft!