That article is a little old as you can see by the printers Michael was using. With the new inks and papers we have today, it really does not make much sense to go by what he said in the article. Unless you are using one of those printers.
Premium Luster Photopaper has become the standard for photo printing. It does yield a better DMax over Semi Gloss and now Epson has just revised Premium Luster to a new heavier weight paper.
The best thing you can do is run your own test to determine what works better