I won't speak to what is "generally the rule". I will say that the same aggressive position that I have on my road bike is what I prefer on my touring bike. For me that means bars 4-5" below the saddle and knees over the spindle. In my experience it is most comfortable for long days day after day.

I don't get how folks ride upright for comfort and then have more weight on the saddle and road shock going up the spine as a result. To me that is not comfortable. Others find it works for them.