aakk9999 - 4:19 pm on Sep 1, 2012 (gmt 0) [edited by: aakk9999 at 4:19 pm (utc) on Sep 1, 2012]
Putting a gibberish word which currently has no results in Google into meta keywords element on the page and then seeing whether the page ranks is a different test to what has happened to mike2010.
Mike2010 claimed that meta keyword helped his page rank where the keyword was his domain name, therefore it was "mentioned" elsewhere on the site.
Better test would be to pick the page and a keyword for which you are not ranking well, then add this keyword to meta keywords and see if the ranking for that keyword improves.
[edited by: aakk9999 at 4:19 pm (utc) on Sep 1, 2012]