More speculation surrounds the fate of its low-cost startup, Song, which Delta launched 19 months ago as a response to AirTran ( AAI ), a low-cost carrier who shares Delta's hub in Atlanta, and JetBlue ( JBLU ), which flies lucrative north-south routes on the Eastern seaboard. Many on Wall Street have said the restructuring could spell the end of Song, but two sources close to the company said this view is incorrect. In fact, the well-branded unit may provide inspiration for the rest of Delta to follow, because it is more efficient and cheaper to run, despite the fact its pilots are paid the same wages as Delta's regular Boeing 757 pilots. "Wall Street has it wrong," said the source. "Song is doing just fine. Song is growing. John Selvaggio head of Song knows what he's doing. And good things are coming down the pike in the coming weeks."