Every time this topic comes up, we are treated to a lengthy analysis of the numbers. In the end, the consensus is always the same: The dubs are growing, but not very fast. I'd add a couple of caveats to this discussion:
1. Most of the growth is from children of JWs, baptized in their early teens (or before), whose level of life long commitment is suspect.
2. The growth of JWs, whatever it is, 1%, 2%, 3%, is almost always the same or less than the average population growth on the planet, which means they are NOT gaining on the rest of the world.
3. We already know their OTHER numbers are suspect (hours reported in preaching, for example, which raises questions about the number of "publishers" who turn in time -- some report time when they weren't really active in the work). Why should we believe any of their reports are accurate? They are not above manufacturing "growth" (i.e., the 15-minute field service provision which artifically added about 2% to the number of publishers last year).
4. Finally, there is no question their growth has slowed, especially in countries like ours. Almost all the growth I've ever "witnessed" in the past two decades is from JWs moving into the territory and attending a new hall, NOT from converts from the field. In my last two KHs, spanning a period of several years, I can only think of a handful of people who moved into the congregation who were actually "new" witnesses; they were all either move-ins or formerly active dubs who'd been reactivated in some fashion (and what a revolving door that is).
In summary, I am not concerned over whether JWs grow or not. Unless they start growing at 10% a year, I see no cause for alarm. They will, at present growth rates, continue to be a small blip on the screen among the world's religions, hardly worth anyone's notice. If they were growing at the rate of the Mormon church (as was mentioned on another thread), and were organized to flex their political muscles, that would be a concern. In Under the Banner of Heaven, author Jon Krakauer cites a sociologist who says that by the end of this century, the U.S. Government won't be able to pass any legislation without approval from the LDS church because of their rapid growth. This is due to the fact that they register to vote and vote the way they're told.