Here is the quote:
"This is not meant to be a true projection or represent how we think the first round will actually unfold next April. Rather, it's simply a look at where teams stand from a broad perspective after the draft, and some big names who could be in play after we finish our initial film study and formulate our first 2013 draft board late in the summer (tape study on 2013 prospects begins next week)." -- Todd McShay
So I would say this is more of a power ranking of players, than a realistic mock.