The Disappearance of Childhood?

I have been reading, in one of those fits of academic whimsy that I am sure overtakes everyone at one time or another, a rather strange little book, the late Neil Postman's The Disappearance of Childhood, a 1994 reissue of his 1982 work dissecting the curiously adultish quality of most modern children and the equally odd childishness of most contemporary adults. (Postman, a Marshall McLuhan-ish