Why is Microsoft allowed to get away with hiding sales figures for the Surface

I am baffled, not that Microsoft would want to hide what I can only imagine to be dismal sales figures, but by the fact that the industry is allowing them to get away with it. MS supporters are happy to talk about how great the Surface is, and how it is much better than the iPad, but are completely incurious when it comes to how it is selling. This, while iPad sales numbers are dissected under a microscope for any sign of weakness. I would be indignant if Apple failed to give sales figures for something as important as the iPad. Why are MS supporters so indifferent?