Of course WN is on record stating that DFW is too expensive... they'd be crazy not to. They have an incredible deal at Love and are working to make that deal even better by eliminating Wright. WN doesn't want to give any credence to the idea that they could operate profitably at DFW if push came to shove (i.e. in a hypothetical world where DAL was shuttered). They already operate at more expensive and congested airports, and when the perimeter taxiways at DFW are done, along with an additional N/S runway, DFW will be even more efficient.