Thats pretty amazing if its true. I have a hard time believing the part about allergies because if you have a serious allergy its not just in your head, you will have an allergic reaction to it because your body does not agree with it.
The point about learning a language very quickly is interesting though. I think you would only be able to learn that language to a limit though, because you can only use so many word, verbs, etc. in a certain ammount of time. I can see the part about language being true though.