There are no reliable statistics available regarding routine timelines in particular local offices.
Forum reports are too sporadic, too few, to be anywhere near a representative sample. They do offer a glimpse of what is possible. Thus, for example, a few reliable anecdotal reports indicating a timeline of less than six months does indicate it is possible another applicant will similarly have a timeline of less than six months. But it could easily be significantly longer even though routine.
Reminder: average timelines do not mean much. Most references to "average" timelines are really more about median timelines or the average timeline for a small group (such as the tiny percentage who report their timeline in forums). I have not visited statistics Canada recently, but they used to provide citizenship application timelines for processing 50% of applications, which of course is the median timeline. That is informative, since it indicates how long it took for about a majority of applicants, which tends to be the most common timeline for truly routine applicants. The timeline posted by IRCC, in contrast, is largely uninformative, since it is based on how long it took to process 80% of routine applications. In the past (again I have not visited statistics Canada recently) the difference statistics Canada showed between the timeline for 80% and 50% could be as much as twice as long, or even more.
Local office timelines were not available last I looked. Again, there are no reliable sources indicating local office timelines.
Applicants today should be grateful for how quickly IRCC tends to process applications. When I applied, in 2013, the routine timeline that IRCC was posting was two years, and the fact that my timeline ended up being a mere eight months seemed remarkable (even though at my oath ceremony many others had shorter timelines, down to six months for some). Among those who applied in 2011 and 2012, a very large number did indeed have timelines in excess of two years.