Dear Pumpkin City,
I can understand that you want to screen for developmental delay. Early intervention is important.
I also understand that child development has a very large individual variation.
But please do not tell me the Pumpkin Prince needs a detailed evaluation of his development because he speaks 5 words at 18 months instead of your very strict cutoff of 6 words, and then give me a brochure about how child development has a very large individual variation.
And please don't tell me it's for my own peace of mind. I think the Pumpkin Prince is developing just fine. You're the one who is all worked up over his lack of a single word and asking me to take the Pumpkin Prince to the pediatrician where the pediatrician and I will waste each other's time as he will judge the Pumpkin Prince to be healthy, happy, and developing normally, and give me his standard issue talk on individual variation.
(Disclaimer: I am not a developmental pediatrician, nor do I play one on TV, but, well, come on, this one is plain old fashioned common sense.)