As an Estonian, I’d just say that Americans have a heavy presence on the internet, that’s all. In my opinion, it’s a human thing, not a matter of race, nationality, or gender. If there were a study showing that one of those groups had a higher prevalence of that behavior, I’d expect it to change over time, just as women and men in South Korea have recently shifted their voting patterns. In other words, the behavior could be tied to temporary cultural/other factors.