Steve, you are right,the Biblical ideal of responding to the Kingdom message was to accept it intellectually and get baptized.
However the JW org as it fails to make headway it is heartened by any apparent success it has and the one area which gives them some comfort is the unbiblical practice of infant baptism or at least baptism of those too young to realize the full consequences of what they are doing.
To paraphrase JW spin I read here very recently were the words spoken by a Circuit overseer, "You want to know something wonderful? Our youths are getting baptised". (Big applause)
Scraping the barrel and trying to see the bright side is what is really going on. The fact is one of membership stagnation which will lead to irreversible decline.