Prof says teens' grammar shortcuts OK on blogs, e-mail
The problem that this professor sees is that teens aren't writing - so, in her mind, any writing is good. However (and I speak from experience), her comment, "Grammar is easier to teach in school than critical thinking or the love of writing, and if they can enter school with the latter two of the three, they are ahead of the game" is simply misguided.
Why? Because many English teachers are not teaching grammar. Because the time at which students should be learning this stuff is not when they go to college, but when they're in grammar school. Because there's a difference between blog/e-mail/SMS and real writing and students shouldn't be told that one equals the other. (link via Librarians Happen).