>Writing out umm instead of thinking it and saying u when you mean "you" aren't the artifacts of different nationalities and the way they communicate. They are the artifacts of lower quality English language communities like facebook.

That's just wrong. I don't know what to tell you.

I'm from Ghana, if you took 10 random online posts from friends without names and showed them to me, I could easily tell you which ones are my Ghanian friends and which ones are my American friends.

In general, different countries have different cultures about everything from emoticons to grammar online. It's telling that you didn't realize this.