The link has some good arguments. I think digital sculpting has it's place, especially with 3D printing, although the featured software, Zbrush isn't cheap, even for an academic license.
3D Printing is all the rage in hacker spaces around the world. Some people claim that 3D printers will be in every home within a few decades. To learn more about 3D printing in general try this wiki link: http://en.wikipedia.org/wiki/3D_printing. But these folks at Bathsheba have refined a 3D metal printing process to make some really interesting art, the technique link describes their process. I purchased a ring at the New York makers fair that was made with a 3D printer and cast in bronze using the lost wax process: http://www.bathsheba.com/sculpt/process/cast.html