Comment two branches (Score 4, Insightful) 667
Linguistics has two branches. One branch is descriptive linguistics which studies how language is used. The other is proscriptive, who describes how a language should be used. This divide is covered pretty often by language log (worth reading pretty often).
This article is just someone discovering descriptive linguistics for the first time and ecstatic that their prejudgments are backed up by a branch of something that sounds like a science. Congratulations. "Science" has "proved" that there are no standards for language and all those teachers that marked up your papers with red pens were just being mean.
There is no One True English, but there sure as hell is a Don't Sound Like a Moron English. Like it or not, people hear more than just what you say. They also hear how you say it, and they tend to figure out who you are, or at least, who you are similar to.
Same goes with clothes. People know who you are just by looking at you. They may be wrong occasionally, and you can feel smug for subverting their expectations, but it is a tool that is right most of the time, and it seems to be wired very deeply into us, so no one is going to stop doing it.
You can whine all you want about how unfair it is, but if you want your ideas heard, your best bet is to sound (and look) like someone worth listening to.