I’ve done it three days in a row now. First day, app froze and didn’t get group until 7:02 and got 93. Next day got in seconds after 7 and got 44, then next day got 40 when looking 5 seconds after 7.
I’ve called Disney, looked everywhere, but can’t find anyone asking, discussing, or answering this question.
Let’s say, theoretically, you are registered in Disney’s system as the very first person to attempt to get a boarding pass. Are you GUARANTEED group one? Or does person B who got it at 7:03 have the same chance to get group 1 as you do, unless it’s filled?
Obviously, no one likely knows the literal inner workings of the system. Simplified: is it a lottery or is it first come first serve (starting at park opening)?
And as a follow up (will test this tomorrow), if it IS a lottery, why not keep leaving and joining a boarding group constantly until you get a favorable position? I plan on testing this tomorrow if my group isn’t in the first 30-40 and if nobody knows a definitive answer.