All people are equally good at time management, but some people are more willing than others to admit that they are doing what they want to do, while others maintain the illusion they wish they were doing something else.
Addendum: Will comments, worth reading. My view is simple: forcing yourself to use your time better just isn’t that costly, so if you want to, you can. What does *Getting Things Done* sell for? That’s about its marginal value. It doesn’t reflect a big shift in time use.