Personally I'm hoping and praying that you guys get your IP and PPRs very soon, because it would mean my turn would also be just around the corner
Based on what people's timelines have been in the past year, I would assume that May applicants would get PPRs sometime in the spring (April-May perhaps). I say this because January-February 2014 applicants are now getting their DMs and PPRs (so 1 full year from application to PPR). Early last year IP to DM to PPR seemed to be only a few months, but right now there are still people here who got IP between August-October and still haven't gotten any progress since.
So with CIC you can never ever be sure. They might suddenly start prioritizing other immigration streams, which will change all estimates again. So I would strongly recommend against making any decisions based on things posted here.. because there's just no predicting what the CIC schedules are.