Indeed, Provincial Nominees who are not under Express Entry (Non EE for friends) now show a processing time of 20 months. However, it clearly states below: the time counts from the moment we receive the application. This means that if you submitted your permanent residence application BEFORE the update date, the valid processing time is the one that was in effect when you submitted it. Until yesterday, I believe it was 11 months.
Why is this important? Because for us, the Non EE, the process is the same as the regular Express Entry process after receiving the AOR, and the AOR itself takes 6 months.