There are people that have gotten their N-400 process in Jacksonville much faster. We might just be very unlucky. Estimated time is now 11 days for me, but I'm 100% certain that after that the status will change to 'things are taking loner than expected'
Here are some timelines from Jacksonville:
https://www.visajourney.com/timeline/citlist.php?op6=All&op7=Jacksonville+FL&op1=5&op2=d&op4=1&op5=&cfl=0