I just returned from a 4 day trip, so let me tell you what our experiences were.
We did MM two days in a row, Sat and Sun. Both days we aimed to be ready to get a ST FP as soon as the park opened. If you're not aware, ST has a fat line to get a FP, throughout the day. It goes from the FP machines (the old Buzz machines), to the entrance line of Buzz, and switchbacks a few times. When park opening hits, it extends past the entrance line of Buzz, almost to the Buzz building itself. At this time, they do not use the entrance line for Buzz, and have you go directly to the building.
So. Both days we were in line for a FP no more than 10 minutes before park opening. Both days we got FPs for 8:50. I'd say there were maybe 30 people in front of me? But who knows how many tickets each had. But FYI, I was out of the FP line within about 3 minutes of park opening. They had CMs at the machines getting the FP for you (like they do at WOC).
The days we were there, we heard FP were gone by the 10 hour. On Sunday, we heard 9:15 AM. So get there fast! If you have any other questions, let me know