I find that extremely hard to believe. Even if the ATL 900's left early (they aren't slated to start leaving until January 2013) that's about 180 planes (about 140 200's) that DAL would have to cover flying for (even if they cut a LOT of lift).
CptRyn - just out of curiosity - in what universe is a regional getting planes like the C-series or 717 a good thing? Or an entire company losing all of it's flying? Wow.