Any stats only shows past performance.
It's similar to stock market. You can't rely on past performance alone to estimate future performance.
I'd factor in the election season that's ending. New administration + less incentive to naturalize people faster. And also each case is unique.
Your case can take shorter than estimate or longer than estimate.
As an example, my I-751 estimate started with 7 months.
I ended up getting decision in 20.5 months, and it wasn't just me in similar situation.
Here's example of somebody's case saying it's taking longer...
The only problem is, file has only been on file for 9 days