I had a not so smiley orange face and there ended up being 15 open seats on a 50 seater, it scared me because US Air had 6 open and I've found that US Air and Eagle loads are pretty close to each other. Interesting because I would think 15 open would be green but maybe like you said it's a percentage, that makes more sense.I believe it's a percentage of seats, but I can't ever get a straight answer. Green, no problem, Orange, good to go depending on how many standby's, and red, well, not so good. I routinely get on frowny face flights, just depends on standby's, and whether an AA or Eagle guy walks up a the last second and takes the JS (happens quite often).