I think a problem in these discussions is the tendency to ignore how different "open source" projects and related experience is.
Of the six programs I list on my CV, five are free software. For two of those I was paid full time to program, and the other developers were all likewise paid. One was a personal hobby/learning project I released the source for because there was no reason not to, but never build a community around. The last two were community oriented, in the first I was the project manager, integrating contributions from all over the world, but writing less than half the code myself. In the other I contributed a large and potentially disrupting change to a high profile project that required active adaption from the other developers to be successful. Here the social engineering was as important than the code itself.
They represent four very different types of experience, and grouping them as having "Open Source Experience" would be unhelpful. The only common element is that it is easy for a would be employer to see the code, but that might even be possible for non-free code if I owned it myself, or had permission.
Of the six programs I list on my CV, five are free software. For two of those I was paid full time to program, and the other developers were all likewise paid. One was a personal hobby/learning project I released the source for because there was no reason not to, but never build a community around. The last two were community oriented, in the first I was the project manager, integrating contributions from all over the world, but writing less than half the code myself. In the other I contributed a large and potentially disrupting change to a high profile project that required active adaption from the other developers to be successful. Here the social engineering was as important than the code itself.
They represent four very different types of experience, and grouping them as having "Open Source Experience" would be unhelpful. The only common element is that it is easy for a would be employer to see the code, but that might even be possible for non-free code if I owned it myself, or had permission.