Originally Posted by Soulsuke
Well, it really depends on which version of Debian you've been running: Sid/unstable breaks often (it's still good as a desktop os imho), testing (currently Wheezy) is made of packages that had little-to-no testing in Sid, it's supposed to be a preview of the next Debian release, but it's not that stable itself... Only current-stable (squeeze), old-stable (lenny) and experimental are the repos supposed to have tested and stable packages afaik
The highlighted text isn't true at all. I deal with several boxes running debian testing and they are all very stable. Further, packages are not passed from unstable to testing quickly. They certainly have been tested by the time they get to testing.