Ubuntu has the benefit of peculiar version numbers. But Debian doesn't. I've often searched for "Debian 6 foo" and received results where '6' is a page number or part of a date or someone's handle.
Because if you search for "Debian 6 foo", you should only be seeing results that contain that exact phrase (on Google, anyways).
This being said, I'm not using a distro that discards a version every 6 months, so I don't need to keep a 'continually scrolling' list of codewords in my head.