Yes, that statement was true.

Sucking habits by children prior to the eruption of their permanent incisors (at about the age of 6) is not a serious problem and is unlikely to cause any long-term problems. The only advantage to the pacifier is that it is likely to be "lost," and at some future date the habit will be more easily terminated.

Pacifiers may be useful when the child wants to suck, but is adequately fed; it may replace reliance on the bottle in some circumstances and, thereby, reduce risk of dental disease. As the child grows older, reliance on the use of a pacifier can be decreased to reduce the risk of deformation of the dentition. Some experts recommend stopping the use of pacifiers by 4 years of age if it can easily be accomplished. Many children give up pacifiers by themselves by the age of 3 or 4, or when they enter kindergarten.