This is interesting. It is a single study based on (presumably) a limited culture. It would be interesting to read the entire study, rather than a 7 paragraph Telegraph article about it. Do you have any other links to more detailed information?
We know nothing about how this study was completed. Who categorize this ends? Did the priest himself keep track or were people given a survey? I just say that this single study isn’t enough to paint with such a broad brush.