Big words better. How else will you immediately judge someone's intellect?
It definitely happens both ways, but I think it's much more damaging to those who are perceived as being dumb, or whose ideas are not considered, because they're direct/plain.
I see this fairly often in meetings. Someone says something very direct and plain, with the root of the problem laid out, but it fails some "complexity" threshold that makes the contrived, incorrect, but fancifully worded explanation get more traction, eventually looping back around to the simple explanation, with no real acknowledgment.
...And then, just a few days later, you find yourself staring at this very problem and all its immense complexity starts looking menacingly at you. Solutions? Ha! how could one possibly even hope to solve such a problem! Except, you recall that someone did. And yet, for the life of you, you wish you could remember what that solution was. Only then can you appreciate its elegance and the genius required to produce it.
"I want a fast game", "I want a very fast game". This site suggests "rapid", "breakneck", and "dashing" as alternatives for "very fast". "Very fast" is pretty clear very precise compared to those words. Maybe I could speak about "a breakneck pace" instead, but would I have really gained anything other than showing off my vocabulary?
Speaking of very precise, it doesn't even have a suggestion for an alternative to that - though admittedly if I wasn't forcing things I would have phrased that sentence as "more precise than those words".
The idea isn't that "rapid" means "very fast" (I don't think it even necessarily means faster than "fast"). It's that people will use "very fast" when they feel that "fast" lacks the punch the sentence needs, even when they don't actually mean anything different from "fast".
To quote the person I initially responded to
> However, if there is an opportunity to be more exact, one should take it without remorse.
That is what "very fast" commonly does over "fast". It costs next to nothing, and it specifies the meaning slightly more precisely.
---
I don't think "rapid" is really a convincing alternative to "very fast" in any case where the "very" is warranted. I liked the "breakneck" suggestion by the site a bit more, but in most contexts I don't think that it's better, just different.
Of course, this all falls completely apart with groups containing a significant number of members with <language> as a second language, where plain speech is required.