This viewpoint really bothers me, especially since it is the published authors who are to blame for it. Unpublished writers didn't figure this out on their own, they were told this by people who have experienced it. But as an author, it's your job to make sure every part of your work is as good as you think it can be before you query it to an agent or an editor. It's a crucial part of your pitch as well, which I'd explained in the aforementioned post. I've discussed this in some of my public query critiques, too.
But who am I to tell you what's what? Perhaps you'd rather see an agent's thoughts on the subject? Consider it done! This is from literary agent Molly's Jaffa's Twitter feed:
You should include "query" and your book's title in your query's subject line. That title makes a big first impression!If your title sounds dated or seems unoriginal, I'll read your query with that mindset.
Your title is important. Your title is important. Your title is important.
I had an editor tell me in his acceptance letter that my title was what initially piqued his interest in the story. He hadn't read a word of the story yet and already, I had him hooked. That story was published last year--the editor did not change the title.
Every time someone makes a comment to the tune of "the title doesn't matter now because the editor might change it anyway," somewhere in the world a book flings itself from a towering shelf. If it's an ebook it contracts an incurable virus.
Don't be a book murderer. Give your title the attention it deserves before you send any queries.