This survey was released a few months ago...my immediate reaction was that I wanted to know the methodology
in excruciating detail. I'm pretty sure Flyertalkers would quickly pick apart inconsistencies.
WN's 99.3% number is clearly for Freedom Awards. While we all know that DL and US are awful, did they really fail 9 out of 10 times to offer up a 50,000-mile domestic U.S. option on the same queries?
If somebody out there really wants to do this study properly, they need to involve Flyertalkers. Everybody else will hose it up.