Sorry to revive an old thread, but as someone who has been on hold with both Delta and Virgin multiple times in the past two weeks, I strongly prefer Delta's music.

I like Delta's jazzy tune and the other pop instrumental is fine.

Virgin, on the other hand, is trying way too hard to be cute with 5 or so vaguely travel related songs that they cycle through. Absolutely grating realizing they're singing about travel when you're trying to sort out a travel problem.