I will try to explain cos we just got our visa. Our meds were received on the 17 Sept which is about where LCU are processing
PR visa meds. Temp visa meds are a bit further on than that. They do seem to take some priority visas meds earlier than others - I think sponsored ones and that. Some of the threads will say meds proceessed Aug as once the meds are processed they then go to your CO who checks the results and finalises the rest og the visa. If they have a large work load it may take longer from meds complete to visa grant or longer if they dont have all your paperwork when they receive your meds and have to ask for more. I hope this makes sense. The easier you can make things for your CO the quicker you may get your visa once your meds are finished at LCU.
Hope i havent confused you!
