I'm a little surprised that their prediction is that high considering the PS2 got 67% during the peak of the PS2 era. I also wonder how they came up with that number. If we assume the Wii gets 50% that leaves the 360 with 10% or less this generation.
source: http://www.gamesindustry.biz/articles/playstation-3-unlikely-to-break-even-says-dfc-intelligence