I keep saying this, but I want to stress again that waiting until park open and hitting "Find Out More" is not the only way to secure a BG. You can sit on the screen past "Find out More" and hit "My Status" right at park open, then hit "Join Boarding Group" on the next screen. This page is refresh-able by dragging down at the top of the page, also, but we had no need to do that either time we attempted a boarding group (we got 28 and 19 on our two
Disneyland days using this exact method).