I don't know about you, but I don't really don't know what "normal" is anymore. Express (and many other newer web frameworks) have really shaken up the landscape. It's not Apache vs. Dynamic webapps, it's much more than that.
Express is less of a different web framework suited for realtime and more of a different way of thinking about what a web framework is. The paradigm and platform it's built upon happen to make realtime a natural feature, but by no means is that the only thing express is useful for.
Express (and indeed, most any other sufficiently mature and flexible framework) is as versatile as you make it. Please don't pigeonhole Node :)