Just adding my tupence in here, although not directly related to the last few posts. If you are seriously thinking of going to the states to 'cram' in your course over a few weeks, I would urge you to try and take the 7 ground exams in the UK before you go. That will take a large strain off your training, allowing you to concentrate more on the flying and enable you to get more sleep due to less revising.
Of course there are arguments for studying the theory along side the practical training. But I feel you stand more chance of getting through in a time constrained manner (3-4 weeks) if you have those theory papers out the way first.
Have a goodun what ever you choose.