Sometime ppl complain here , they send it , not reached them yet, not updated yet...etc. What i understand about how they pick our files are batch basis like based on the month or year we applied because all our files are waiting in a queue.
They don't pick files based on who completed all requirements. So in my opinion, Upfront medical does not speed up the application.
If you see mostly, they send MR to all ppl applied in a particular month or send PPR to all ppl whose AOR is closely to a particular month. What is the pointing of doing it upfront assuming that it would speed up our application. I am specially talking about Sydney and Ottawa office where they have thousands of applications. Not other small visa offices. My file is still in Sydney.