Well, even among developers there's clustering. So not many developers are "most productive" using those DVCS. Probably because they have never heard of them or never used them, but it doesn't really matter right now.
If your name is Git, you're number 1 in the DVCS space. If your name is Mercurial, you're a distant 2. If your name is neither of them, only a few people have ever heard of you. Sort of like this: http://xkcd.com/435/
If your name is Git, you're number 1 in the DVCS space. If your name is Mercurial, you're a distant 2. If your name is neither of them, only a few people have ever heard of you. Sort of like this: http://xkcd.com/435/