I wasn't aware of that feature. So, with at least that one run perfectly calibrated, I held a pace of 5'30". So that is 22 seconds per kilometer off from the uncalibrated iPod. So that would come out to roughly 3.7 minutes slower in a 10k than my iPod thought I was.
Fairly steady pace. Not pushing too hard, but a bit faster than I've been running. Looking back, the last time I held that pace was June 10th, 2008: almost 2 years ago.
Listen to me. I sound like frickin' Rain Man, except I've probably had a math error. Someone correct me. Anyhow, the 5:30/km (8:51/mi) pace was real, it was measured. It is not very fast, but it is slightly faster than I've been, and it seems like a good place to start working on improvements.
Anyhow, glad I got out. I was faster than the 4 other runners on the track (which is kinda sad).