WN doesn't promise a choice between the Dom and the Krug, but what they do promise, they deliver. Never had a problem finding a way to use a RR (and I've used them for places like LAS, MCO, BDL, DAL). While I don't fly a lot of WN, they do have some nice car rental/hotel promos that add value to RR and my ability to travel. The bottom line is I don't mind flying Y on WN, and if someone wants to hand me ~$300 in free coach tickets every so often, sure.

On the other hand, I can see into both DL and AA saver inventory on AS. My experience agrees with that survey: AA kicks DL's butt when it comes to overseas awards on their own metal flying to places they have in common (LHR, CDG, FRA, NRT). My experience redeeming US miles to fly US (yes, I know: this was before US started the share miles promos, so I thought I had ~25K orphaned miles from my HP days, instead of realizing what this was worth once I swapped between some accounts) was similar- it took AGES until I could use them.

It seems to be true that that survey isn't considering partner awards and elite benefits, which probably affects DL and US's value- but that's fairly advanced sort of stuff.