Safety in aviation has reached a standard, where dicussions which break it down to "how many hours does your instructor have" are useless. JAR has yet to prove that it is saver then any other regulation. I have flown with pilots which were trained under JAR and they scared the s**** out of me. They fly as happy VFR into IMC as "FAR" pilots. Common sense you do not get by regulations, neither by an instructor that has 50 hours more. It is the attitude towards flying you learn during your flight training that makes the difference. I had hardcore european instructors (in the sense that they where absolutely sure that the US license is worth less) and US instructors and some even had both. And from my humble point of view, the best instructors where those that acctualy liked their job. Their had more knowledge and a better attitude then those who where just building hours. And that goes for both worlds.