So, does it turn out that all those nut jobs who ignored science and claimed that putting a neurotoxin in the water supply was a bad thing might have had a point?
Others in this thread have already indicated why this study doesn't help with much. Unfortunately it will just give the anti-fluoride crowd ammunition.
Actually, I think it's a pretty personal and difficult question to answer that's unlikely to be uniform across Europe. Perhaps it's because they drink more tea and coffee which themselves have high fluoride levels (~3-5x fluoridated water levels in the US?
In some places they remove naturally occurring fluoride from the water until it reaches what the WHO considers safe.
I personally always choose the highest fluoride toothpaste I can, because the benefits of reduced tooth issues make up for a (if you believe this paper and their pointillism graph) 1.2 pt iq drop.
It always makes me sad how many people think that just because some group is making a decision that affects them, that group is out to get them.
And, before someone says it, no, I'm not opposed to these studies being done occasionally for the sake of conventional wisdom being wrong, but people shouldn't try to make hay off a non-effect.