I played the manufactured spending game full-bore for about 10 years and ended up with, among other things, about 1 million miles on each of AA, UA, and DL. For several years I was flying actively on AA so not often redeeming miles, but I've now effectively retired from both work and travel, and I'm a free agent among where I redeem my miles.

When I compare prices in miles, it seems that DL are always the highest and often by a lot. Domestic, overseas, Y/W/J, always much higher.

As a long-time flyer, with loyalty varying according to location and travel pattern, I'm well aware that the grass is always greener; devotees of a particular carrier bemoan their fate, the whole loyalty game run amok, I'm just saying - I'm sure people on this forum whine about devaluation, but is my perception correct that DL is devalued much more than other airlines?