hello , my 2.6 year boy not talking properly.. doctors says , he will talk upto 4 years..it's normal

A. Mam on what basis is your Dr giving you that age limit can you please explain that what is your doctor told you because usually if the child doesn’t pick up by the age of 2.5 years we consider this as a delay in the speech so for my side I would definitely recommended to consult a speech therapist once