[tpeng]

Very few people even bother to track calories. Some people do have trouble sticking with it, but for most, the eureka moment happens sometime in the first week when they realize that they are consuming far more calories than they had believed. It's not a problem of perseverance when most people aren't even bothering to get started.

[refurb]

That's a fair point. A lot of people track calories and fail at doing it well enough to loss weight, while others never actually try.