Japanese delivery services are generally next day too, and Amazon doesn't even seem to know about it. There are so many times when it told me something would be

Japanese delivery services are generally next day too, and Amazon doesn't even seem to know about it. There are so many times when it told me something would be delivered in more than 2 days (in a particularly ridiculous case, it was telling me 7 days) that were actually delivered on the next day. So yeah, in some countries, the delivery speed is not a factor making Amazon more attractive.