Well, I've just been upgraded 100% the past two trips on DL. Scales tipping......
Plus, I've just gotten the DL AMEX, which offers 2x miles June 15-July 15, not to mention the 2x miles available year round for "everyday expenses."
Now, if I could just figure out whether all these miles are going to be useable...
Thanks for all the point pro and con about both programs.