Worth noting too that the age demographic is decidedly younger than at other airlines. I would guess that the majority of captains are in their early to mid 40's. That means that there will not be mass retirements anytime soon. Add to that changes in Super Laws and a heap of older guys who need to keep working due various reasons means there will be no flow through the ranks.
Unfortunately I think it may be heading back to the days where you have to get into an airline before you are 35.