Originally Posted by gleff
Delta
Will match status, generally to equivalent level up to Gold (mid-tier)
Send a copy of your current elite statement or elite card along with a note explaining you'd like to shift your busy to them if they'll match your current status to:
[Edit] There are recent reports of Delta offering "challenges" in response to status match requests -- that is, fly x segments in y days for status.
Thanks for this thread. Will let you know how the request turns out!