I couldn't agree more with you on that, the patience is surely the key here. In Montreal VO, April AOR candidates with very normal application statuses are still awaiting the PPR. I have learned one thing now and it is don't compare your timelines with other similar AORs as it could only amplify your anxiety. Instead, order GCMS and figure out the plausible explanation for your application's slowness. The reason sometimes could be nothing. For example, it could be something as simple as the case analyst or the VO haven't touched your file even after 3 months and hence no movement. To conclude, relax, stay updated for your own case as it might help you proactively preparing the further documents before IRCC asks for one. Lastly, wait until the 6 months timeline mark and then call IRCC and ask what is causing the delay now!