> Mostly just that it's easy for an American (or at least, myself circa several years ago) to assume that the overwhelmingly vast majority of Muslims live in middle eastern countries, and when I first learned that Indonesia was the world's largest Muslim majority country it proved that mental heuristic to be entirely inaccurate.

I live in Australia, and when I was growing up I thought the same, even though Indonesia are a very close neighbour of ours. Indonesia is featured quite a bit in our local news these days, and that together with lots of Aussie tourists in Indonesia, plus lots of Indonesian students studying here, has made us a little more knowledgeable about our neighbours.

Also, the Indonesia that most Australians only ever visit is Bali, which is mostly Hindu.