I'm in the same boat as you guys - sponsorship approved on Feb 13th and still waiting for the PPR. I know how it feels, at least from the forum it appears that the majority of applicants who got their file transferred in Feb, Mar and Apr have already got the PPR.
Its hard, been hard for us. My wife who I am sponsoring is in India along with our 3 children, and its been very tough to be apart. But, we're keeping the faith and hanging on. Hopefully as someone mentioned before, perhaps the stamping will come quickly for us after the PPR.
I submitted a online query to NDVO which I'm not very hopeful of receiving a reply. I thought by May-end if we still don't get the PPR, I will send the GCMS notes.
Best wishes and prayers to all to be reunited with their families soon.