Here's a recent email to me:
I will not bore you with a long query letter that you do not have time to read (I hope the writing speaks for itself).
1. Brief synopsis
2. First 2 chapters
3. Brief resume
No. No. No.
The failure of logic is stunning--I don't have time to read a query letter so how about the first two chapters instead... and the synopsis ... and a resume.
Unless you're planning a ten page query letter, you'd need to be in Bizarro World to think reading this would take less time.
Let's also remember that a query letter should provide reference information like what kind of book this is: YA? Middle grade? Novel? Memoir? Word count too.
This is a form rejection with singe marks on it.
(and a not so subtle link to the QueryShark blog)
Don't take these kinds of shortcuts. They're counterproductive.