Having moved from the Netherlands to the US only recently (well, it has been 5 months already) I think this is one of the more interesting difference I can find. I swear I have never, ever, ever seen a woman breastfeeding in public in the Netherlands. Maybe it's just me not paying enough attention, or maybe I was always on the wrong/right place at the right/wrong time, but I can not remember ever seeing a woman do that. However, I remember thinking two months after I got here that women here are super open about that. My coworker breastfed her baby at work, I saw a woman doing it on the BART (the subway), one in a park.. numerous!
I don't know what to make of it. It might be that it is because it's Berkeley, which is pretty topfree in general..it's just one of the very many interesting things I discovered on this awesome journey.