AAG will likely follow the rest of the industry. As is usually the case though, being an industry follower as opposed to an industry leader, it will end up costing them more in the end.
The odd thing is, US Air was one of the first mainline companies to establish an E190 fleet. When Parker took over, he had a perfect opportunity to grow the fleet and fill the 90 - 110 seat market gap. Instead, he wasted millions trying to pressure the regional airlines into lower costs to only have market forces to require him to reverse almost every cost cutting initiative.
AAG shareholders have paid him millions and he has accomplish nothing in two years. They should have paid him to sit in his office and do nothing and AAG would still be better off than it is today.