<The Pew survey, conducted in 44 countries, found that six in 10 Americans described religion as being "very" important in their lives, while secularism is prevalent throughout Europe and Japan and the former Soviet bloc countries.

For a survey to be valid, the same questions must have been asked in all the countries.
Yet, the answers differ.
And there are plenty of examples, public or personal (like my US family viewpoint compared to the European family), or how the US president takes oath or when he's campaigning, how many times "God" comes back in all his speeches (not only during campaings), when I was in the US the number of TV broadcasts on sunday morning about the matter, etc...

Raoul