You might also want to check out the current _Consumer Reports_. They rate airlines based on their own surveys, which have their biases as do any others. Some of the discussion had to do with FF programs. A number that sticks in my mind (I don't have the article here) is that American has the highest percentage of available award seats, 10.0. I think Delta was lowest of the majors at 6.3. (Please don't flame me if I recall the numbers wrong, but please do correct them.)