Thanks for your help (I mean all the answers). It gives me another point of view and so I've read again the good parts of the book. (good parts means : the parts that I needed to read again to have another layer of understanding)
I didn't realize but there were still things bloking me while photoreading. That's why I was expecting too much (for a beginner) and why I was waiting for proof. As I have understood what was blocking me I'll be able to improve my photoreading.
Thanks.
Just for information : I bought the book by chance (hazard) while searching for another book (not about reading).
Now in France I've seen it in a magazine (about management) and at TV.
Photoreading appears in France and is developping.