There may be some countries that have even more freedom of speech than the US, but the USA still produces more words. Therefore it does, mathematically, have more free speech than any other county on Earth. USA! USA! (c'mon everybody)
I'm not American but I didn't feel particularly oppressed by the country who invented the internet overseeing this function. But I would also be surprised if it turns out that Americans are the only decent, freedom loving people in the world.