Not sure this is entirely the case. I mean, take me. Sift through my comment history here and you'll see that I'm not really much of an OSS guy. I'm selfish

Not sure this is entirely the case. I mean, take me. Sift through my comment history here and you'll see that I'm not really much of an OSS guy. I'm selfish enough, or at least self-interested enough not to hand out my work for free. But even I have put in a handful of pull requests for .NET open source projects (and have released a few projects of my own). There's a lot of room in the gap between me and "open source devotee". I wouldn't be surprised to find that there are a ton of guys there that happen to be good at stuff on the Microsoft stack.