It has forced me to write more concisely and directly the same point in which I was "wordy". There are always times when deeper/richer context is necessary, but that should be the exception to the rule - less is more. When I'm receiving 100s of work emails per day, I would rather read an email written like it was from Ernest Hemingway than Kurt Vonnegut.
You can convey a lot in 5 sentences, as I just did.
An exception is emailing people I don't regularly work with, e.g. a professor at a university who I've never met. Those I do try to keep short and to the point, to maximize the likelihood I'll get a reply.
There are second, and third, paragraphs for a reason. Take two minutes to read them, so that I don't end up telling you [rhetorical] the same thing five times.
It's a pleasure to encounter the person who doesn't respond for a day or three, but then actually addresses the points in my email. The end result tends to be a much more efficient and thorough process.
I think you're trying to make a 'smart' reference but are confused. Overall, Vonnegut was generally at least as, or more concise; there is an entire page in _For Whom the Bell Tolls_ dwelling on the sweat on someone's brow.
http://www.kcstar.com/hemingway/ehstarstyle.shtml
[edit] which is quite different than how Vonnegut writes
That's not what I'd call "quest for concision". It was a light-hearted comment.