I noticed within the last few weeks that more often when I come to the site the review queue icon is marked with the red dot. That usually happens if there are queues which have an unusually high number of items in it. For the close votes this number appears to be 20.
Some time ago I have adopted the habit of letting most (almost all) closing be done by the community as such a democratic process is exactly what the system was designed for. As a consequence I only checked whether the queues are drained and helped out occasionally if the numbers were getting too high. That worked very well for quite some time.
However, recently I have used my hammer more often than I wanted, simply because it appears to me we don't have enough active close-voters anymore.
This is a very subjective observation and I have not checked any numbers or statistics about that. I simply wanted to share this with you and get a read on how things are within the community. Please share your own thoughts and observations with me; if you think we (the moderators) should do something differently please let us know.