Hi, to begin with, I checked my email last Friday around 9am ist and it was there, apparently it was sitting there since 3-4 hours, you will get your PPR mail only in your private email account that you have provided CIC with, there will be no indication of PPR in your CIC account, so check your inbox and spam folder regularly, I sent my passport for stamping this Monday and today when I opened my CIC account everything changed from being under review to approved, it tells me that my passport has been stamped with the visa, so it took 5 days for stamping, be aware your CIC status will not change till your passport gets stamped. Let me know if you need any more information Mr.Future Canadian

Ps: No idea yet about how long the visa is valid, but should be till medicals.