Something along the lines of R. Buckminster Fuller's "When I am working on a problem, I never think about beauty but when I have finished, if the solution is not beautiful, I know it is wrong." came to mind reading your comment, Ms. Antonelli. Though I imagine you mean a more explicit effort must be made to reach an aesthetic quality in order to be considered design (whereas some might be happy to say "this is design with good aesthetic, and that is design with bad aesthetic").
So the question is: is a notion of aesthetics ("formal elegance") contained within a definition of design, or not? And further: is it time to formulate a new definition of design? I believe this is part of what is happening currently, as mentioned above.