Cutting through the rigmarole and verbal diarrhea...
Having seen the photo nlagelle put up, I think this is a good sign (no pun intended). I'm not sure what the trials are meant to do, i.e. is it meant to test how fast boarding will be (overall) and whether people will actually pay attention...
In fact, the latter is just my biggest gripe about priority boarding, and I see it all over the world in almost every airline, with the possible exception of the USA where they've had it for so long it just sticks (although the problem is when you have non-eligible pax lining up on the red carpet who then chuck a big spat; whether they get admitted or not they really hold up the whole boarding process). How non-eligible pax in the priority boarding line are handled will be interesting to see. For Gate 4, it will be most interesting as if you are not eligible, you don't just shuffle across (as people can't phase through a plastic wall...yet). Also, what is the etiquette for being denied priority boarding when you are clearly not entitled? Do you shove into the front of the non-priority line or re-line up at the back of it? Again, just another potential source of a spat waiting to hold up the boarding process.
I, for one, am not going to be happy if an on-time departure is held up due to a tussle at the boarding process. I know it probably won't be the airline's fault, but I still won't like it (and naturally there will be a complaint filed in the paper the next day by the offended pax accusing the airline of some sort of moral turpitude).
So, in summary, the enforcement of the benefit is what will be of most interest to me. I personally think any airline needs to take a hard line on it. The same goes for priority security - it needs to be strictly enforced.
On top of this, I hope priority boarding happens all the time, or at least when the load factor is > 70%. None of this "only during peak hours" guff.
Also: does anyone believe that, similar to most Asian airlines (although not officially), families with small children (i.e. under the age of 12) should be allowed to board first as well?