In the new age of text language, the rules will be torn up. Get used to it. I'm sick off the English pedants that attempt to be-little those that don't obey their rules. If you understand the message, who cares! I'm also fairly sure that I can make those pedants look like utter fools if they engage me on a topic that doesn't involve English.
What the "pedant" posters were trying to tell the OP was that, as things stand, the movers and shakers in his chosen career path are, like me, probably at the pedantic end of the spectrum.
Given 2 applicants with the same qualifications I used to favour the one with decent grammar and spelling.