Case specific inquiry takes 7-30 days + to receive a respond depending on the case itself, if it is urgent they will respond right away. I once submitted a case specific inquiry regarding my express entry application and got a respond in 7 days.
On the other hand, I am currently working on the additional documents that were requested - Police Certificate and Schedule A. Turns out I didn't complete the personal history section and left some blanks so CIC requested a Schedule A for that particular period of time.
I hope the rest of you will hear some movements soon. Once your medical is set to passed and no additional documents are needed then you should be on your way to PPR. My medical was changed to Passed the same time CIC requested additional documents.