Certainly it's a matter of personal preference - but if it is the duo in question, the stomping did affect my enjoyment of their performance and other people I know(in addition to the ones who commented in this thread) have said the same. The foot percussion doesn't have to go away, just be toned down a little, and it also probably very much depends on the floor surface as to how obtrusive it is. Obviously this duo is successful and, as many have pointed out, they are very good at what they do, but I think some of their potential audience is put off by the heavy percussion.