Well, average counts any time you're coasting, too - downhills, when you're just hanging out talking with someone, softpedaling in a paceline. I just got a computer that logs average cadence last week, so I don't have a lot of data, but I do know that on the flats I'm almost always between 95 and 105 unless there's a stiff headwind and I'm either solo or taking long pulls. But the last four rides I've done in hill country my average has been 81-89.