So I noticed that I wasn't very clear with what I was asking, and thought the video would speak for itself.
The older build (October 2015), loads up very quickly when I press the "trash" button (for the ML menu). This is what is expected and how it had been for a long time. I have two identical CF cards (64 gigs), one with the older build (October 2015), and the other with the newest build for 50D (as of a few days ago).
The newer one is like 500% slower on loadup time than the old version. It's so slow in fact, that I can pretty much take a picture in the time it takes to load. Why is this, and what can I do to make this load faster? Is the build not optimized? What am I missing? Help!!