I've read in some other threads that the time to get SA is really going up, it is up to 52 days now. Not sure how this will affect the time between AOR & SA. Also, maybe your SA is in the mail already and it is just slow.
Medical results received means that the doctor has sent the results from your upfront medical and it is now attached to your file. It doesn't mean you passed the medical or anything like that (but really it seems like you only fail if you currently have TB). Most people are getting a medical results received update but some aren't. I haven't yet, and Axxis never got one and we already got his passport request.