Ugghh.
I had a guy texting me for a while who abbreviated EVERYTHING. u, 2, 2moro, c u, r... whatever he could. It drove me insane. It makes me all the more appreciative of my friend whose texts messages are very formal: "I'm sorry I didn't call you back earlier; I was helping my father with his car." Yaaaay proper English! T9 makes it easy enough to spell out whole words anyway, I would think it would be HARDER to type with abbreviations.