Vomit doesn't usually conjure up pictures of happy people. Trust me, I've got two kids.
Brain Vomit, however, can work. (if you don't know, bv=first draft)
This is something I need to remember (erica speaking). I spit out my first vomit draft without a care in the world - because I didn't know any better. Four months for a book - sure, no problem. But then, it took a long time to edit. And no, it's not published. But the words flowed. The voice was there. I learned a lot from the process. My first draft turned into something I loved - even if it didn't work for the commercial world (yet).
Recently, I vomited up half a book. Then I rewrote it because even though it had a ton of voice, it went in the wrong direction, plot-wise. Suddenly, I stalled. The thought was there. The plot was there. The voice was there. I was - oddly - not there.
Was there a lesson to learn? Why yes, there was (is).
Vomit drafts are good. They prove you have an idea. Revisions can take care of the mistakes. Go You!!