"It doesn't matter to Tim Burton, perhaps. Tim went to high school in Burbank, where I live, odd but working ... to readers, who are often trust fund babies who don't really need the job but are playing at becoming producers."
I was a reader for the Sundance contest, strictly working-middle class upbringing (Dad picked cotton and stole watermelons in his youth, etc.). The readers I knew in L.A. none were trust fund babies.
But the real point is that any affectation in a script, whether it be exuberant use of caps, underlines, exclamation points or screen direction matter ONLY IF these things are covering up flaws in the writing screen direction because you can't tell what's going on, wrylies or excess exclamation points because the feelings of the characters aren't clear from context, etc.
And if a character is always cranked up to ten, it's likely his dialog will have a lot of !!.
One of my favorite scripts from the sundance reading era was something written nearly entirely in italics, narrative form with play style dialog. Because the characters were intriguing and the situation rich with conflict. It was a pain to read, but the main characters are still with me...
"o, they latch onto what they think matters, the formalities."
I've read a few dozen coverage documents lifted from a handful of studios, and you know what, format is never mentioned except in passing (i.e. so weird page count wasn't to be trusted). My two friends who were readers say the same thing whack format is a leading indicator of crap writing, but not alone something to judge a script on.
Maybe you could post specifics that you've seen that lead you to this conclusion, esp. about trust fund babies? The trust-funders I knew (one) went straight into producing, skipped the grunt stages entirely.
Mysti