Coincidentally, the WSJ has a story today that analyzes recent gov't data and concludes that you can't tell which ff program is best for redemption! They do say that each airline allocates about the same percentage of seats for ff awards (about 8%), but there's no way of knowing whether customers are paying standard reward levels, whether they're flying partner airlines, etc.
http://online.wsj.com/article/SB1165...N=wsjie/6month
If anyone who is not a WSJ subscriber is dying to read the (inconclusive!) story, drop me a line with an email address, as I'm allowed to send email copies out.