"Unable to explore setting, conflict, characters or themes in their fiction, the mainstreamers wrote more and more eloquently about nothing at all."

No. Don't hate on real writers and 'elitists' (which is used in a nonsensical fashion in this piece) because most modern science-fiction is formulaic and ill-written. Look at Margaret Atwood's Oryx and Crake. Has all the hallmarks of a science-fiction novel, yet somehow is considered 'mainstream.' Because it's well written. There are many talented sci-fi and fantasy writers out there, and if they would get out of their cliches, tropes and their contract with Tor, they could be just as exalted as the folks the author is denigrating.