According to this post six recommend deletion votes will only automatically delete a post if it has a score of zero or less. So, if it was at 1 when you submitted your review, it wouldn't be deleted.
Yes, a sufficient number of delete recommendations (currently 6 on most sites, 4 on Stack Overflow) will cause the post to be deleted immediately, provided it has zero or negative score. (If it has a positive score, it will raise an automatic moderator flag instead.)
I guess it's up to the mods to delete this now, although I cast a vote putting it at -1 and casting a delete vote. I also flagged it as very low quality again.
This is why I always take the time to click the 'link' button on the review page, open the post in a new tab and cast a downvote before I'm going to vote to delete a post. Just a tip for if you want to prevent this next time.