After many years contributing to open source projects, I can't say results of SlashData's developer survey surprise me much, but it's good to see my feelings are shared.
That being said, I think what developers fundamentally want is not necessarily open source per se, but to avoid the miserable feeling of being tasked to reinvent a wheel. Those who have the necessary talent want to create generic solutions to widespread problems which can and will help as much people as possible, not just their little organization. Here's hoping for more code sharing, more satisfied developers, less wasting of our top talents in duplication, and fewer but better wheels.