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Linux Mint Debian Edition officially released
(blog.linuxmint.com)
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Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).
Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.
Community icon by Alpár-Etele Méder, licensed under CC BY 3.0
I've only been running Debian testing for a few weeks (hopped from Ubuntu dev), but I believe testing also has a 2 to 10 day period before pulling packages from unstable. Like after 10 days in unstable with no issues it automatically gets moved into testing, with more important updates getting a human moving it earlier.