Yes, from the standpoint that you have a definite date when it'll be published. Without that, your piece may wait for months or years until the magazine decides they want to use it. One of my poems was accepted by a magazine 13 years ago and still hasn't been published. Fortunately, I was paid for it, but it would be nice to see it in print. On the other hand, that same magazine published a craft of mine almost immediately. In that case, it was a quicker publication that most acceptances for themed issues, but that's a rare situation, in my experience.