Here's how I see it. The photoreading whole mind system is complete; that's why it's called the "whole mind" system. It incorporates all of the mind, many different reading techniques and is far more comprehensive than any "speed reading" course which is going to focus on moving your eyes faster, with possibly a little emphasis on layers (like in Evelyn Woods). But no matter what, none of these systems have the PhotoReading step. The more and more comfortable I get with PhotoReading in general, the less I can quickly read something (like an e-mail, quick news article, etc.) without first quickly photoreading it. It just seems pointless to me to waste time not using the system.
However, it has taken me time to get to this point, time invested in actually using the system. What I noticed at first was that the effects of the PhotoReading step were minimal, if anything. However, the more you become aware of your mind's true abilities, the more you practice the system and the more it becomes comfortable (in my case, understanding how layered reading works was what got me to a comfortable level) - then the more you understand the power of the PhotoReading step.
That of course doesn't mean you can't apply ideas learned from Speed Reading courses, such as moving your eyes faster while Rapid Reading. But what it all comes down to for me is that Paul already discusses how to make Rapid Reading flow --- rythmic perusual. Plus, rapid reading includes learning when to speed up and when to slow down for details.
Hope my two cents makes sense. Basically I'm trying to convey that PhotoReading is complete, and the only thing I think is applicable, possibly, from any speed reading course is moving the eyes faster, reading clumps of words, and stop subvocalizing - applicable to the Rapid Reading step.