GC key is more accurate so linking your account is very important. Biometric or Medical instruction letters are received in GcKey portal and i find GCkey updates more accurate as compared to PR tracker. As the updates reflect late by a day or 2 in the PR portal after GcKey.
New Delhi is not slow, it is slower than Mississauga, but it’s definitely not slower than Amman, or London, or Daressalam.
AOR2 doesn't really exist. If the sponsorship is approved, the sponsor will then receive an email from IRCC confirming this, usually followed by Biometrics and medical requests sent to the Applicant and the applicant receives their own UCI number. If in your case you haven't received this email (to the applicant), then they are probably still assessing the sponsor's eligibility.
Some people from Singapore office like me did get AOR again after BIL. The AOR sent to PA just confirming that the application has been received by Singapore VO.
Sure, but in terms of progress of the application there is no difference between the two.
Not sure to be honest! It seems kind of random from what I've read in other threads.
