There is an immense amount of stupid in that thread, not that it's shocking considering where it is from.
There is no reason there should even be a question about what's going on. They have pictures of previous games..why the hell wouldn't they? It's an easy visual of who lines up where and what defenses they run out of it and of course it's reliable. It's not like Michigan invented a bunch of new defensive sets in 1 week, of course what they ran was going to be the exact same thing. (They are shitty enough with what they do already, not like G-Rob was going to throw a bunch of new shit onto their plate)
This is a multi million dollar football program not some Division 4 high school where they have to just draw a bunch of x's and o's on a sheet of paper. Having print outs of exactly who will line up where on what play is immensely helpful and theres no reason you wouldn't bring that kind of stuff with you.