I believe with the current strike going on, PPR will take quite some time.
If I were you, you just enroll your kids this September and just continue in Canada once you and your family gets there.
Just my two (2) cents, good luck :) :) :)
Same here, we had our medical last June of 2012.
Still, no PPR 'til now and the present strike plays a big role on our situation.
Hoping that the strike will end soon so that they'll get our application moving forward.