He's right. We all know people who are forever making some new affirmation about themselves. But notice that physically fit people talk about fitness after they're healthy, real authors talk about books after they're written, engaged people talk about marriage after they've set the date. You know who you are.
One of the many things I respect about the New Apple (the one after Steve came back, as opposed to the one where I once worked) is how they talk about new products after they're finished and ready to sell. Too many people and companies, in the name of "setting expectations" or "being predictable", give their customers a "roadmap" for the future. I think the only roadmap that counts is your track record.