Hi Guys,
Below are my timelines.
Applied on 21st August 2018 for WP and Dependent visitor Extension
Called IRCC helpline on 23rd Nov 2018(Friday). Customer care representative mentioned, ideally it need to be approved by 29th Oct 2018. And he informed me that he is keeping note on my case to pick it on high priority.
Approved on 26th Nov 2018(Monday).
So my suggestion would be, please call IRCC, then only they are processing it.
Note: Dont worry about visitor extension timelines. If it is combined application and WP holder is primary applicant then they need to consider only the primary applicant timelines for dependent visitor extension also. (This has been informed me to IRCC customer care represntative)