I tried (for the first time) the shining new review page a few days ago, as I understood that there is a new, smarter way to do it.
It seems that the big pile of "Low quality posts" goes down much faster than before. I remember seeing it at about 32k posts yesterday morning and it counts now 29.4k posts.
Is it true that the trend changed significantly after the introduction of the new review system? If yes, that's a bit congrats to you, guys!
Time has answered my question. The image below (taken on Sept 9, 2012) is a good illustration of the result: