Not quite sure how to define intuition, oh well
The photoreading step alone would sometimes leave me with this "soaked" sensation, though it would wear off after a few hours, probably due to the incubation. But my intuitive and empathetic perceptions have been more sensitive, and although I don't credit it all to PRing, it could be partially to blame, hah...
I figure, during PRing, since those are the few times we are voluntarily using our subconscious (ok, non-conscious) mind, that part of us that gets exercised builds a few more little bridges to our conscious minds. And since the subconscious is the source of our hunches, or at least the main source, those few bridges serve more than just an academic purpose of reading. This is my metaphorical theory of what is going on and what can happen.