It is the Search Grader that is new, we have just released it today.
This isn't really helpful. I have no clue what the scoring is base on and why it determines how good search is for any of these sites. Is there some kind of break down. Why a delay? Is it designed to be manually reviewed?
Yes for the moment this is manually reviewed, we will try to make it fully automatic but this is a very complex topic.
We will write a blog post that explain the whole ranking.