Yes, specially during high season. They will also enforce PATs. Issue is that you need to go thru security prior to getting into the terminal.
But it clears out quickly. And you don't gain anything by arriving earlier or at 10:30 if you don't have a 10:30 PAT.
Concierge goes in with group one. I believe gold/platinum go next. Then the boarding group is based on your PAT, that is, those with the first PAT will board next.