Just and update: I took the truck in to a different shop and had it realigned. The cross caster was set at -1.3 deg (which the specified range is -0.9 - 0.1 deg) so needless to say, it was way off.
They made the adjustments and the truck drives beautifully. It's still pulling a bit when I'm in the very left lane of the expressway, but I'm sure that's due to road crown. I may have them adjust things a bit more to compensate for that - because I tend to drive in the left lane a lot