Significantly? Well it depends your reference for money (2 bucks extra an hour is probably a lot to someone making that much), but Mesa is on the lower end of the scale when you compare similar Regionals like Mesa, RAH, PSA, Envoy, TSA, Compass, XJ, SKW, Horizon, etc.
But again, I wasn't attacking them or ALPA. I was just pointing out that they're on the lower end of the pay and work rules spectrum and can staff better than anyone else. While ALPA's goals in this situation are admirable they just don't have any leverage in this situation, so I wouldn't be holding my breath for any kind of improvements.
Especially when the CEO of Mesa purportedly said, (paraphrasing), "if I can fill new hire classes, then my starting paying is too much!"