It's really not an American issue. It's an immature people issue. I've yet to meet anyone who actually cares about whether their messages show up as blue or green when they send them. My social network (in the US) is about 50/50 for Android and iPhone users, and we have a variety of group threads that have both types of phones in them.
The only people that care are:
- Maybe some children
- Some immature adults
- A lot of people who have never used an iPhone and don't even know what the blue/green bubble is but whine about it anyways.