maybe they know how to validate hours with no problems for european hour builders..
When I first started my training, I did not know that I would end up in Europe. I logged all my hours according to the FAA regulations. Then, later on, I realized I had the opportunity to live in Europe. When I got to Europe, I found out that a lot of my PIC time did not count as PIC time under European rules. I had to go back through my logbook and addup all my hours again according to European rules. It took me about two days. Not only that, what seemed like a lot of PIC hours under FAA rules come out to barely having enough PIC hours under JAA rules to qualify for a CPL conversion. It is a good thing that I did not do the safety pilot trick at all during my hour building or I would have been given a rude awakening.
Any European school you go to will not find some "trick" to count your hours. They WILL be able to tell you which hours are valid and which are not.
Like BigGrecian said, you already have your answer in the previous posts.