The point is that mass consumption of dance music was a huge thing in North America.
I mean it's funny. In the early 90s I went to visit my extended family in Germany. At that point I was already a major techno fan, but the funny thing is that when I went to Europe all my cousins, the music they listened to was mostly American R&B and hip-hop. Watching overdubbed episodes of Family Matters. Huge consumers of a side of North American culture that I did not. So to me the demographic situation is more complicated.
I think many Europeans on this thread might have a biased perception of what music consumption in the 90s in North America looked like based more on North American exports than on what was actually happening here. That and most people here are quite young.