Yeah. The foam-filled feel of a Donnay is pretty solid. I remember a couple of years ago at the 2010 Australian Open, Blake was using a retail BLX90 and took JMDP to five sets before losing in a tiebreak. If he had a Dunlop mold racquet customized with the materials of a Donnay and leaded up to 13.5 ounces, that would probably be a beast to play with.
Crappy piano http://www.youtube.com/watch?v=XOyaNG-qX8U