I don’t have a direct answer for you but I can tell you what I know and hopefully it can help you make a decision.
I interviewed on 10/18 and they told me they were on the 5th week of interviews (out of 15), when I asked. They only conduct interviews on Fridays from what I noticed. There is only one person going through all the applications and scheduling interviews as she goes through them. From my personal experience, you can schedule your interview up to 3 weeks in advance. So right now, it’s more than likely that interviews are booked up until 11/15, which would be the 9th round.
Generally speaking, it does get harder to get an interview if you apply late. Harder though, not impossible. If you are confident that you have a stellar application that will make you stand out, then you still have a chance.