I think its not just Pakistanis who face an exceptionally long processing time. All LVO applicants have a similar problem ( excluding exceptional cases like those with job offers). This problem of agonizing waiting times is also faced by those who use busy offices like Buffalo.
That said, CHC London operates with uncharateristic panache. They refuse to give updates unless more than a year has elapsed. They have no logically discernable system with which applications are processed. If they were working on a FIRST IN- FIRST OUT basis, I would have long heard from them as I sent my application on 01/07/2011.
In two months time, I will have waited a full year just to receive my medical requests. At this rate, planning to land in Canada 24 months after applying is a pretty optimistic assumption.