Lots of whining, including from yours truly, about not getting upgraded as much with DL as with NW. Does anyone know what the cause of this (the lack of upgrades, not the whining) is? Theoretically anyway, both are large enough that their flyer populations s/b about the same. Both should have about the same percentages of business travelers vs leisure, same percentage who purchase full Y fares vs LUT, same percentage who fly 25k, 50k, 75k, etc.

DL doesn't seem to have fewer FC seats / capita than NW. True? Does DL do more upgrading of non-elites in some way? Does DL fill up more FC/BE seats with NRSA's than NW?