Yeah it's pretty low. A lot of the senior pilots in CLT had only one reason to look elsewhere. They lived in Carolina so naturally they would look at one carrier. USAirways for the CLT base and that was it. For many that was a lost cause just do to the fact that airways wasn't really hiring and used to have terrible starting pay plus a not so good standing+contract. Recently Airways picked up hiring and with a merger things are now looking up for them.

The problem for the senior CLT guys at mesa is that life has been okay for them. Live able wages combined with easy commute and seniority in base. 10+years flew by and now it likes "oh snap I haven't even had a training event in forever?"

Even with all of this, many will hold on and ride charlotte out until the last man. Then I gather many will go to IAD merely due to various Carolina hubs with flights to IAD, Not to mention the ability to commute IAD will be on express. Possibly commute (UAX-mesa) from GSO,CLT,RDU etc. or wherever these guys live in the Carolina's.

The commute to DFW might be a little more challenging plus mainline AA commuters and USEast guys that live in Dallas might make for a challenge. The slight time change and lower priority will not help.

I doubt any will jump to PSA except the "new" new hire FO's like RV5M that are easily impressed and don't have anything to lose.
Mesa will go bite the bullet for PSA in DFW and let them avoid that brouhaha.