In early 1990s they said that there are about 5 million jws in the world. By year 2000 it became 6 million. There hasn't been much growth in the U.S. according to their kingdom ministry newsletter. But other ethnic congregations are growing, so I was told by my mother whose congregation splitted in to 2.
I think many people already know that the WTS is a cult, but they don't know how dangerous it is, though.