Although this statement might be true, this is not about what is best for US.
US is definitely NOT the best combo for UA, and Tilton knows it. That's why it hasn't happened yet. Plus, the internal problems at US currently seem insurmountable, so no one is interested in inheriting it. DL or CO is where his intention lies. And DL is only interested in NW or UA. UA already held informal talks with CO last year when US was going after DL. Additionally, even the hedge funds prefer a DL/UA combination. (Follow the $$$).
Therefore it is easy to see that the players in this round will be DL, NW, CO, and UA. US will either be on the sidelines, or may benefit slightly by the reduction of overlap from the mega mergers. (Just like AA and TWA were indirectly involved with the attempted acquisition of US by UA in 2001.) But this continuing obsession with a US merger with UA is still just a fantasy of the old USAirways.