If you send me a query, and you've revised it more than once, read it aloud, and proofed it, you're not wasting my time by sending it. No matter what.
It might not be something I want to read; how will we know unless you query?
It might be something that doesn't fit what I do really well; how will we know unless you query?
It might make me scream bloody murder and hide under the covers (Score! Query for the Win!); how will we know unless you query?
Short point to this post: You are not wasting my time by querying even if it's not right for me. I want you to query. (I want you to query WELL which is the point of all this ranting on the blog and QueryShark.blogspot.com but even bad queries are better than none.)
You are my farm team. I need a bunch of you coming up the ranks to write great novels. I mean someone has to give the slithery Barbara Poelle a run for her money.