They're not exclusively using N615PA, but I imagine that Hicks' finnacial troubles and the pending sale of the Rangers had something to do with parking the 757 in Georgia. Or perhaps they'll still use the 757 but it's in for a C check or D check.
The article was a little overwrought, but that's still pretty cool. I never really considered how AHL teams get around, but the far-flung cities need planes just as much as NHL teams in the West. Flying a turbo-prop that much would make me pretty nervous though (groundlessly, of course). I guess you get used to it.