Let's keep in mind that most of the instructors of those high dollar schools are opinionated. They all have weird ways of looking at certain aspects of racing.
I haven't attended their schools but have met most of them over the last decade and been around enough to hear them preach their philosophies.
I've read both of Keith's Twist books and find them quite informative on most items but I don't agree with some of his views(primarily the whole countersteer stuff). The example of letting off the gas and drifting wide is accurate in most circumstances because of the way it affects the suspension. Doesn't always push but normally will if you don't compensate. Keith has a significant amount of racing experience, tuning experience, and experience on the money side of running a team. One problem though is he has been out of the serious game for awhile and some of his ideas just don't carry over to the modern machines. Not to mention that most of his experience on and next to a bike are with 125 and 250 GP machines.
I always give Freddie the benefit of the doubt and whenever I'm in doubt I take the Freddie route. The guy won the 500 and 250 GP championships in the same year... he is versatile and knows how to adjust. Plus I like his approach to races and how he breaks them down into segments. I have seen him race up close and personal plus I've seen how professional he is with the behind the scenes stuff.
I also like Jason Pridmore's approach to racing. He is a nice guy that is passionate about racing and really wants those he is teaching to learn. I gathered this information when talking to him the first year he had the school. His dad has some unorthodox approaches to certain aspects of riding fast. Mostly with body positioning. I've found that some of his techniques work for me and my style but not friends.
I personally don't think it is necessary to spend that amount of money for a school to go racing. Most organizations are connected with other instructors' school that are much cheaper and still teach the basics with enough thoroughness to have fun racing. Ed Bargy, Frank Kinsey, Learning Curves, Team ProMotion being a few. Then when you feel like you are stalled with the learning and racing spend the money for Freddie's school. There are alot of top level AMA riders that have just attended these lower priced schools.
Of course if you already have the money and it isn't an issue then hell yeah go to schools like Freddie's or Kevin Swantz's.
The big key is that there are alot of opinions on how things are done. Not all methods work for everyone. I've seen enough of these guys when they were on their race bikes to know the styles they used and that helps me filter through what parts are probably bullshit and what really is good. Also remember that all of the big name schools are run by guys that have had quite a bit of success on the track and it wasn't a mistake. I lose respect for an instructor that says another instructor's ways are bullshit. It may not be bullshit for their style or their whole approach. Disagreements are one thing but saying the other person's ways are wrong is messed up(well except for that countersteering one
Well that's enough from me.