The best advice for query letter writing: "Don't be weird"

I do so much of my research online and was at it again, this time for info on query letters, when I came across this article about writing QLs to literary agents. The recommended structure is very much like film pitch and treatment documents that I'm used to but with a writer's bio attached. Here's a link to the article:
How to Write a Query


It's got great advice for new writers and I laughed out loud when I read this line:

Don't be weird. Phhhhlease.

Very funny. You've been warned!