30 million words fewer in 3 years?? That's 27397 words per day... at 12 waking hours per day for a child it's about 38 words per minute - I find it hard to believe.
I was curious too. To get a back of the envelope calculation on how fast people talk I watched a talk show and counted how many words they said in 1 minute. It was 103, so it seems possible.
