No, the sound clip images should stay in, for one simple reason. If you download sound clips and listen through PC speakers then you may well not hear any difference. The images need to be there to back up the audio - see my comments above about "what" and "why".  

If you look in "The Death of Dynamic Range" article linked at the bottom of the page, there are two kinds of diagrams given.  The first are the kind on the page, they really don't give much information above and beyond this sounds louder than that.  However, the second kind which are in "The Death of Dynamic Range", but not in the article.  I think its just a very zoomed in picture that specifically shows peaks being cut off.  I don't have the capability to replace them, but I think they would make a valuable addition.