I already got my medical + AOR last month. According to ecas, they started processing my file on Jan 14th.
I applied CAIPS in December. At that time, I didn't know my file number at all and couldn't access ecas with client id of work permit or study permit.
QUE100, CAIPS only shows my file number, when they asked for medical exams and when they wanted one of us to do fingerprints and some personal information such as nationality, color of eyes, height and so on. Because they dealt with my request on Feb, 10th. There is no more information than I already knew.
I plan to apply for CAIPS in 1 month. Maybe it will tell me when they receive my fingerprints and medical exams at that time.