I wonder if, over time, this trend will lead to a shift in what is considered acceptable writing. Once the "texting" teenagers of today take positions of leadership in government and corporations, they may be more accepting of this writing style.
At the end of the day, every communication with your employer is an opportunity. If you can't communicate well, you will be less likely to get what you want out of those interactions. On the other hand, if you're able to write well and communicate clearly, you're going to get what you want far more often.
I'm clinging to this theory even though I have pretty much zero evidence backing it up, because the alternative, that "dat was hawt, amirite?" will eventually become acceptable writing, makes me depressed beyond words.