You can't control how the airline orchestrates boarding, but you can control how you board. It's much less stressful to stay seated in the lounge while everyone waits in line, then jump up at the end.

I understand the impulse to get on the plane, but it's irrational if you aren't using the overhead bins. (As a rule, I do not. I always check my bag plane-side.) Getting on the plane earlier won't get you to your destination faster. So, don't stress about it, sit down and relax.

Although, my attitude could end up screwing up these optimized methods. But I don't think it hurts in the back-of-the-plane-first method.