I just came back from a wine festival in Va and I now have this nagging question that no one from the wine festival could answer...What is the differences between oaks. For example what makes french oak different than american or "fill-in-the-name-of your-state-here" oak? Is the diffenece that huge or is it subtle things? What are the differences in flavor and texture? Any help would be greatly appreciated so I can educate some of the wait staff at the restaurant that I work at, they have the same nagging question now.