I can drum up a couple more if you're looking for more data (the references in that study also contain a few).
My understanding is that, in addition to the Czech Republic, Canada, Croatia, Denmark, Germany, Finland, Hong Kong, Shanghai, Sweden and the USA have also been studied and have similar results.
The other observed behavior is that it has done a couple of things: sets ridiculous/false expectations, second desensitizes or commodifies sex (so in order to become aroused, despite having the partner right there, they need pornography to get them in the mood.) Not sure how much distortion has happened but it has to some degree.
I can drum up a couple more if you're looking for more data (the references in that study also contain a few).
My understanding is that, in addition to the Czech Republic, Canada, Croatia, Denmark, Germany, Finland, Hong Kong, Shanghai, Sweden and the USA have also been studied and have similar results.