Processing times in Islamabad boil down to funding of staff. The speed at which processing occurs is directly proportional to staffing in Islamabad, and the number of applications filed.
The Harper government is generally reducing staffing, or placing a freeze on immigration related staff in all embassies across the board. This means things will not get any faster, but not neccessarily worse either.
Typically, more people get married in Pakistan in the winter, and they end up applying for immigration between the months of January - March. From people that work in the Islamabad high commission, what I understand is that almost 50% of family class (spouce and dependant) applications are filed in the first 3-4 months of the year.
You can use this information to figure out if things will get faster or slower.
The only way to make things better and faster in Islamabad is if federal politicians can convince the Harper government to increase funding in the Islamabad High Commission, which is probably never going to happen in this economic environment.