Interesting.
So, according to that article they overbook by 5 percent (500 per 10000) and end up with 8.3 per 10000 oversold. Additionally, only 0.56 per 10000 were IDB
http://downloads.aqr.aero/reports/2010aqr.pdf (page 56) That's quite good, IMHO.. Of course Eagle has a 3.76 rate for IDB. or almost 7 times the rate of AA mainline.