We flew 2 weeks ago from MCO to DEN. Since I had not flown Frontier much in the last year or so, I was interested in the early boarding of elites. We have Gold from purchasing it earlier this year.

At the gate at MCO, the gate agent asked for Diamonds and then, I think, board first or military. Not gold, so we boarded in group 1.

Upon landing at DEN, I saw a gate agent there and asked her how elite boarding should go. She said Diamond, then something that I did not catch (probably 'board first'), and then military.

Both MCO and DEN are pretty big hubs for Frontier and have full time staff, so I think they knew what they were doing.

So, sorry that I didn't catch the whole story exactly, but I think Diamond are the only early boarders.