I attended the class in 1993 with my whole family. I don't think my parents, sisters, or one of my brothers even tried anything outside of the class. They expected to be able to do the whole process as soon as the class was finished. One brother put some work into it and I put more work into it. I still couldn't do it, partially because of some unrealistic expectations I got from talking to people.
A few years later I developed some recall and test taking techniques that I posted to Mindlist and more recently on this forum. I was in my last semester in college and was working 40 hours per week and training in martial arts 8-10 hours per week. I really had no time to study much. On a few tests I only Photoread the chapters and used my activation techniques for the test. I made the Dean's List that semester and also the National Dean's List. I will say attitude was part of it. NLP makes people a bit cocky at times and I don't think someone who was scared or nervous could have done it. I also normally did well but I did better with less effort. I still had little conscious comprehension of what I read.
A few years after that I worked a job for a short time where I had 3-5 hours of "free time" on the shift where I could read. I photoread and then activated 3-5 books a night through super reading and rapid reading. In the past I tried to get spontaneous activation without the "speed reading" part. I was doing everything I could to avoid that for some reason.
Last summer I reviewed the class and it was much better than the first class I took. Most people were far more skilled at the end of the class than the people were in my first class. They really improved the classes during the past 10 years. I did learn from the class, and I also realized I left out some things in my streamlined approach, but I also noticed that I was better than I thought I was at this skill.
The bottom line is that most people will have to work at it. Some might be able to get it right away but from what I have seen most don't. There are probably also some people who won't get it. Others may have to change their mental programming for it to work.