Self-tracking: "If man were meant to fly" and other objections

Self tracking for performance has a place on the map now thanks to the May 2 New York Times Magazine article by Gary Wolf. But along with praise and interest, "The Data-Driven Life" also drew harsh, skeptical reactions.

Many of the objections were of the "if man were meant to fly, he'd have wings" variety. But many others were valid.

The practice will run…