Originally Posted by Alex
Mailed my documents (copy of EXP card and latest statement via web printout showing 100K+ miles so far this year) on Dec. 2. As of today my CO status is now Platinum. It works.
CO (and at least previously US) seems to be the only major "legacy" US airline that status matches up to and including into their top-tier. (AA, DL, UA and NW are -- to say the least -- certainly far more reserved in considering such top-tier to top-tier status matches.)