I think reviews are down at the Quill since it does take an effort to remember and type in your password. *rolls eyes* I always amazed that people don't leave reviews anyway, and not being a member is a great excuse not to bother. I think it's harder on the new authors since one or two reviews for all that work is kind of discouraging.

One good thing about the new system is that the reviews on a whole are longer and more thoughtful. People really have something to say if they bother to log in.

And you're right about May. It's a busy month and the weather is nice in most places, so I think readership in general is down. But don't try to analyze review numbers - you'll drive yourself crazy!