Customer Service satisfaction (as opposed to Operational Metrics such as bags, etc., as measured by the DOT stats and the Wichita Airline quality ratings) is usually reflected in other surveys such as the JD Power Studies:

2009 Results:
http://businesscenter.jdpower.com/ne...spx?ID=2009121

OVERALL:
1. Alaska 671 pts
2. Continental 669 pts
3. Delta 641 pts
Traditional Network Carriers Average: 626
4. Air Canada 623 pts
5. American 618 pts
6. Northwest 614 pts
7. United 604 pts
8. US Airways 599 pts

Flight Crew Experience:

5 out of 5: Alaska
4 out of 5: Continental; Delta
3 out of 5: Air Canada, American, Northwest
2 out of 5: United, US AIrways

Inflight services Experience:

5 out of 5: Continental
4 out of 5: Alaska; Delta; Air Canada
3 out of 5: United; American
2 out of 5: Northwest; US Airways

2008

Overall Results:
http://businesscenter.jdpower.com/JD...df/2008069.pdf

1. Alaska and Continental 684 pts
3. Delta 669 pts
4. Air Canada 654 pts
Traditional Network Carrier Average: 650 pts
5. American 644 pts
6. US Airways 640 pts
7. Northwest; United 628 pts