How is any of that relevant to managing a company the size of a small city and financials the scale of a small country that makes a suite of software he doesn't appear to use much?
Not that I'm defending PG's suitability to the role, but, given Microsoft's size, if you require prior experience at running organizations this big, your candidate pool is awfully small. It's best to hire someone who knows the tech and the market, and assume that the organization stands for itself (i.e. does not require a major overhaul)