As a Brit also working as a pilot in the US I can say as others have mentioned that there are both good and bad with both Euro and US systems. The Euro system has a very comprehensive ground/theoritical base (dificult and inconvenient as it may be), there is no denying that it produces a theoritically knowledgeable person. However by the time a US trained FO gets to fly a Jet he has (usually) accumulated some solid flying experience eg single pilot IFR, he has been a Captain and made wx decisions and is therefore more useful to the Captain, I think than a 400 hr FO. Having said that I am not taking anything away from European trained FO's they have to pay their dues too albeit in a different way. As a Business Jet Captain flying in the U.S. I have flown with both types and cannot say I have had any worse experience with one type over the other. The systems are diferent and I think they will remain so for the foreseeable future.