I think it's a lot harder to have this particular type of communications failure if you're writing on a chalkboard. Imagine trying to write out that whole slide, it would take forever. If you really did have to present that information on a chalkboard, you'd be significantly more likely to write something along the lines of:
"We checked the test data: possible to damage tiles significantly"
"Foam that hit wing was way bigger than the tests"
Obviously you can miscommunicate via any medium, but I think the author's point here (which I agree with) is some mediums lend themselves to specific types of miscommunication.