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But the thing is, you still don't use any punctuation except for the odd pauses and and exclamation mark, to me thats not good grammar. I'm not picking on you particular, because most people who talk in text talk don't seem to produce good grammar either.
I'm 16 and when Im on msn or on my phone, I type out everything properly, so I know my language won't change and I can type it pretty fast with no problems, and I bet I could beat most typing, even using full hand.