These questions are for discussion purposes. I'm not looking for an official ruling.
Q1: Do you think that proper grammar has any effect on a manuscript's potential success?
At a different site, an aspiring fiction author who'd asked for comments on something he'd written objected to my pointing out a grammatical error—a common error that could easily be corrected without affecting the original writing. His objection was that he was unaware of the grammatical rule, and that his writing was understandable as it was. I agree that it was understandable as it was, but is correct grammar now so irrelevant that a simple correction isn't worthwhile?
Q2: Do you think that self-publishing is going to affect the rules of written English?
I read a lot of self-published e-books. Even though I don't bother with the 95% that are junk, most of the ones that I do read still have glaring errors in their written English. However, I'm fairly picky about these things—yesterday I was checking CMoS 16e to see what the rules are for apostrophes on the genitive case—so I'm far from your typical reader. I suspect that most of the errors that are glaring to me would be overlooked by most American readers. Certainly I've seen a lot of "loved the writing" comments from others on books that I couldn't finish because the English was so poorly constructed.
The Web is already laden with non-standard English. If self-published e-books become popular, will that be enough to push the accepted rules of written English to accommodate the mod modes? With bunche's of e-book's having apostrophe's in their plural's, will editor's and teacher's have to change their standard's to conform to the author's's style's? (Ow, that hurt to write. Ow ow ow.)

