Interesting points, so thanks for those. Oh, and I'm from the UK, although we get a taste of the US culture here.
Nice gaijin: if you said that you liked Australian culture over Indian culture, I would take it as an implication that you knew about those things already. I mean it might prompt a confirmation question like, "Ah, so you're familiar with Indian culture then?", but I wouldn't see it as out of place. But with American culture, as in this case, it's quite a global force, so I figure quite a lot of people are familiar with it on some level.