I'd wish I could summon up something like this in a conversational timeframe:
My seven year old is an outlier, he learns crazy stuff at all sorts of rates. Neither conventional wisdon nor studies based on the middle of the curve are adequate ways for me to judge his behavior. I don't question how he goes about it, whether with books or "screen time" (welcome to 2013, where that is becoming a fuzzy, fuzzy line.) He downloaded around a dozen math apps this past weekend alone. Last night he was watching a video and doing practice questions on Pythagoras Theorem and understanding it. I would be a fool to interfere with this.
But probably the best I'd get out would be:
Thank you for sharing your opinion with me.
But in the back of my mind would be a sentence involving the word "need" and a couple of pieces of anatomy.