The 'CEO of the cockpit' has an view at
http://www.avweb.com/news/ceocockpit/194397-1.html
I can understand why, in the light of long previous experience that the current system can change, (ie. a captain at age 60 does not suddenly become unsafe overnight), but I can also sympathise with the feelings of a future captain who suddenly sees their promotion date extend by possibly another 5 years.