There'd have to be vacancies for migration to occur, but make no mistake about it - PHX will go way senior with each vacancy. Over a few years PHX or LAS A320 Capt would be senior to A330 Capt. anywhere.
If the east gets a 40% pay raise jan 2010, there will be a flood of vacancies in PHX, as the company transfers flying at the rate of 10% per year (28 aircraft the first year) per the TA to PHX. Anyone else notice the fleet list is by N number, not serial number?