On the one hand, I see very few posts in the review queue when I visit.
On the other hand, I see a lot of pretty awful first posts sitting on the front page.
This leads me to suspect that robo-reviewers are blowing through the queue.
Given how empty the queue is, could you please increase the number of people who have to check in before a post leaves the queue?
Of course, some honey-pot solution to detect and disable the auto-clickers would be even better.