What is the percentage of kids with speech or language problems?

What is the percentage of kids with speech or language problems? (Question asked by Heather H, mom of a 3 year old boy) Heather recently took her son to the pediatrician for a routine check up. Prior to the visit, Heather suspected that her son's speech and language skills were behind his peer group. During the examination, she shared her concerns with the pediatrician. The pediatrician listened intently and went through a top line screening. After the evaluation, the pediatrician shared the mother's concerns and suggested that her son get evaluated by a speech language pathologist. Despite Heather's previous suspicions, she [...]