Overall, it seems similar to previous years. You can look at the previous years' Wikis for comparison. In general, anything with an October (probably November too) deadline will have been posted by about now or 9/15 at latest. @Vapanon (above) is right, too. There usually are posting surges around the 1st and 15th of each month, but not all months are equal in my experience. Usually September and October are a bit more active. December can be an okay month, too, for positions that plan an early spring search.
Finally, biggest advice I have is that if you are open to positions outside of the R1 world, then don't give up until the academic year is near concluded. Several positions at SLACs or regional universities, especially in less desired locations, will not succeed with their fall searches and may repost come December or even January/February. Furthermore, many positions may well be filled by faculty who are making career moves between institutions. In such a case, their present institution may need to start a search late fall or during the spring. So, if you apply broadly, you can still find opportunities as late as March or April.
Good luck.
