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When I think of texting, I think of using the stupidest input device for human language ever devised, and even stupider in light of the telegraph, which was invented in the common sense in 1837 (Samuel Morse's version). From 1 button to 10 (11, 1 to send) buttons in well over 150 years is pretty pathetic. They had an excuse in 1837. There's no excuse now.
So, I would discount MSN/IRC/Skype and all the rest where you have a real keyboard. And no, I would not count anything that requires you to limit the use of your digits to 1 per hand as a "keyboard".

And no... I will not be satisfied with SMS as something that I could actually use until it enters the realm of sane usability. (I'm actually working on seeing if I can get that done. I'm looking at trying some speech recognition stuff on mobile devices. STT or SR.)
Though I must admit that I am shocked at hearing that you go over the 3,000 limit. I just can't imagine having the patience to do it.
I guess it all just boils down to most people having a LOT more patience than I do.
But like WTF do people text that much about? Seriously. I just don't have that much to say I suppose.