Same here, I applied August 9th and no interview notice yet. Processing times vary due to different factors: local office, 3yr vs 5yr rule, pending i-751, etc..
Finally, an update! My status changed from 8 months until case decision to 7 months.
I filed early under the 3-year rule and I am eligible for citizenship on November 3rd.
That's awesome! We filed around the same time but I haven't had a change in the estimated processing time. I hoping that the SF field office picks up the pace as I'd love to start the new year as a US citizen!