I can't speak for others, but I know that I personally have not mastered the system in a short period of time simply because I do not feel I can use it for everything. But I -know- that you can. It is just a matter of doing it. If you trust it and use it, you will benefit from it. Period. The main reason I think most people have less that perfect results is in application. They, myself included, would go off and set some time as "Photoreading time" and assume that once you get good at that, you will use it in the situations where you need it, work, school, etc.. But the key to success is not putting some time to the side to devote to Photoreading, just plunge right into it, and the time it takes you to get good, really, really good will be very, very short.
"Necessity is the mother of all invention." If you want to learn this in the shortest time possible, give yourself no other choice than to master it. It might hurt at first, but the learning curve will look much more rewarding. It might also be a good idea to keep the Natural Brilliance model in mind when doing this, so as to not fall on your face and have no way of getting back up. The sink or swim method may not be the best for everyone, but I think it has high yields. Just don't sink. 
