Once PA is in Canada, passport request is not needed. They give you pr through virtual landing. The process took about a month for my brother last year.If you receive the passport stamping letter, go for stamping because it takes 4 months to update the information in your file.
In my case: They sent me a virtual landing email, but I informed them that I was outside Canada and needed a PR visa. It took exactly 4 months for them to send me the passport request letter.
The file goes back to the officer, goes into the review queue, and then they review everything again, then they send the letter.
Please think twice, before take any decision.