I sometimes find, as I practice activation, that I am spending a good bit of time with a book--but, once I get to that point I perceive that my comprehension is higher than it would be with regular reading, with less strain, and no tiresome highlighting.

I got a very good sense of Bob Woodward's 450-page tome The War Within, including grasping his two key arguments and the examples that sustain them, in about 2.5 hours. Back in college, had that book been assigned, I suspect it would have taken me 10 hours to get to that point.

Highlighting is something the mind does when purpose and/or dialogue with the author combine with having done the PR step.