Remember that IRCC's official estimate for Citizenship Grant processing time is 12 months. Looking back over the past spreadsheet there isn't a single example of any application taking more than 6 months, so it's understandable to have high hopes for a similar timeline. However I think the influx of October applications is only just now starting to show it's evidence on the spreadsheet with the November and December AOR's averaging closer to 50 days (all other months in 2017 were around 30-35 days).
I'd expect this to be a continuing trend, and I have a feeling that most January AOR's will come 50-60 days after IRCC receives a completed package. But this still keeps things on track to be under the official estimate of 12 months, so we should still be considering any faster processing to be lucky!