What is it then? Is it because it's an ad supported way for google to deliver ads to more people? I hope google dies. I do not want to see an ad supported future for the internet.
So what instead? Pay to visit sites? Or are you expecting sites to run on fairy dust?
The article says that the USA as a whole has a lower use of secured AP. So unless there are huge numbers of unsecured APs in the rural areas of America, the large cities (with their secured APs according to this theory) will swamp the results, yet that doesn't seem to have happened. Therefore I think population density isn't the major factor, and this is bore out by the fact that Sweden and Norway (countries with low density) can come higher than higher density countries.
The densities for the larger European countries are ordered: Netherlands, Belgium, UK, Germany. While those countries were high on the list, it cannot be all there is too it as Spain comes top.
I have to say I'm disappointed by this. I much prefer the simple interface of the spatial view.
Where was that file I was looking at earlier? Open folder, there is is exactly where it was the last time I was in this folder.
Oh well another simple interface lost to the bells and whistles brigade.
Some people have a great ambition: to build something that will last, at least until they've finished building it.