You missed my point, flwombat. When a published writer throws around such terminology, you'd expect he would know from where he speaks. Such things are their 'bread and butter,' as they say.
As for the other, I'm suggesting hubris because Doctorow hasn't earned it: He's a new writer and he's never done anything (to date) even approaching the level of Card's "Ender's Game" or even Heinlein's "Starship Troopers" (which I don't regard as any great thing).
To put it another way: If you talk smack on the court and then play a bad game, you shouldn't expect people to take you seriously.