I emailed CPP Ottawa and according to them it does not matter that your file went to Ottawa or Islamabad.. Your processing time is 28 months or more because you are from Islamabad.
Here is the email:
Good day,
Your file is being processed by the visa office in Islamabad.
It is part of a work sharing arrangement Ottawa has with Islamabad. While our office has part of your physical file, your application will be processed by an officer in Islamabad, according to the processing times of the Islamabad office. An agent from that office will contact you when more information is necessary.
The processing times for the Islamabad office are published on our website: http://www.cic.gc.ca/english/information/times/perm/fc-spouses.asp
Warm regards,