From what i can gather and talking to a few instructors in the US the newer UK JAR PPL exams are geared towards people that will go on to study at ATPL level not for the (Pleasure pilot) that sounds wrong
The reason i ask is that ive moved to the US with a new job
i completed my FAA PPL and found the ground exam side far better as i had a groundschool then studied the question bank job done no problems..
When i was still living in the UK and studying for the UK JAR PPL i found i was learning a lot of irrelevant stuff. I did pass all my ground exams but would have liked to have had a better study tool than here say and the some times right some times wrong confuser