Graphics - Are they helpful to students?

This is an interesting article that points out that graphics embedded in text or technology can interfere with student learning because of the "artistic" value of the graphic design.  "Pretty" doesn't enhance but can distract.  So when we encounter distracting graphics we need to point out the basic information the graphic is telling the student.  Please note the comments at the end of the article.  One in particular points out that a well designed graphic is to the point and "could be" pretty.

Study:  Prettier Charts Can be Harder for Students to Read.  Sarah D. Sparks.  5.9.13. Education Week - Inside School Research
http://blogs.edweek.org/edweek/inside-school-research/2013/05/graphics_are_often_intended_to.html

Have you encountered this in your classes. Have graphics helped your students understand the content?  Share your thoughts below.